Full disclosure, I'm 11 years elder to you and at 16 I was in the exact same boat. I also started with anime and didn't do any structured life drawing until I was 19 and in college for an animation degree (I spent the first year in college learning I didn't care to become a Psychologist.)
Today, I'm finally at a point where I can say I am successful. I am making a full time living from work on comics, but not in the way I thought I would. It's better than I thought it would and I never imagined myself quite...here.
More on this later. Let's focus on you.
There's a lot of general advice here but, I'm hoping to give you something more specific that you can act on immediately.
The question is, can you see yourself doing this every day? Drawing and writing every day, simply for the enjoyment of it. Would you do it even if no one paid it attention?
It's satisfaction, not passion, that sustains you over time. Passion and love might lead you to the thing you enjoy, but do you enjoy the process is the question.
If you love the process of making a webcomic, nothing else is relevant. All outcomes are no longer important. What's important is making and finishing the comic in a manner that gives YOU satisfaction. Then moving on to the next one.
If others enjoy it, if you get featured, Hey, Bonus! yay. If they give you Ink, if you make money from it--More Bonus. Yay. \o/
But in the end, scratch that itch. Just tell your story. We're just storytellers, that's all. Tell it as if you were telling a treasured friend something you find exciting and go off. Finish the story.
--
Here's something encouraging, if you only improve by 1% every day, you triple your growth by the end of the year. 365 days, 365%. All that matters is everytime you sit down to write or study or absorb good content or just draw, aim to be a smidge--and I mean the smallest smidge--better than you were yesterday. (Read: https://www.goodreads.com/book/show/590652.The_Slight_Edge for more on this concept)
Big overnight success happens after a decade of unseen tiny successes. No one will see your hard work and when you succeed in a way they CAN see, they'll call it talent. It falls on you to give yourself credit for all the work and study you do that only you witness. Others are unreliable in giving you credit where credit is due. The only one you can truly count on for your success, is you.
See, success happens on an exponential curve ONLY if you continue doing the useful tasks every day. You don't realize you're on an upward trend until you hit the truly exponential explosion. The "overnight success".
Until today, I honestly assumed I'd never breakthrough--as a thought experiment. I'd ask myself, would I still do this if no one read it, and if the answer was "hell yeah, I would read it." then I'd make the story. Nothing else mattered. That I wanted to make it happen meant it was going to happen. To heck with everything else.
--
Here's the most specific words of wisdom I can give you that will actually give you your next steps:
List every skill you need to make a successful comic and decide what specific resources you need to become proficient in those areas. Then Act on it.
Note, This will feel like a lot. It is a lot. 
But you don't have to get good all at once. Remember the thing I said about improving 1% every day? You only have to take one of these things and learn or practice them at least 1% a day. It helps to think in terms of years. Don't underestimate the power of doing small seemingly insignificant tasks daily. 99% of life is maintenance
Another thing to remember is that when you start learning things--you become really aware of what you don't know and what you can't do yet. That internal editor wakes up and starts poking at you. And that can feel VERY discouraging.
When you feel that way, just go back to the core and tell the story. Trust that you can tell a story cause as humans we do that every day. We tell people about stupid stuff that's happened to us, we share news about others, we tell each other about our lives in the form of stories. Stories are hardwired into our culture, that's why readers can tell a good story from their gut even if they can't tell you WHY it's a good story.
Just always know you can do this in a way that no one else can, because you're you and you have your thoughts and your opinions of the world and a story is nothing more than putting on a mask and revealing exactly what you think about the world through metaphor.
Here's my list of relevant skills to make a successful Webcomic (All of which I STILL cycle through and practice throughout the year):
Summary
Enjoy and study good Content:
Prose and comics you love,
Film and shows you love.
Notice when you enjoy certain genres, conventions, and tropes. Notice what you don't enjoy, what you would change, and what you feel is lacking.
Absorbing good content will make you familiar with the larger landscape of stories of which you'll be a part. It'll also help you from falling into trope traps and stereotypes.
Study Prose and Screenplay Writing. Writing is structure, not the little detailed bits and bobs of format and surface level grammar. It's the core structure of Plot, Setting, and Character that ultimately create Story. (Some of my favorite books to start with is:
Bird by Bird by Anne Lamont
Zen in the Art of Writing by Ray Bradbury,
On Writing by Stephen King,
the making of a story by Alice LaPlante,
and Story by Robert McKee << this last book basically taught me what I needed to master and I credit it with guiding my comic Swaha to the Incubator contest win.)
Save the Cat -- is ok too for beginners but I don't recommend following formulas...like ever. Actually I'm not sure I like this book at all xD; But it's useful to read.
Art Study:
++ Anatomy ( the skeleton and superficial muscles, Variety of Structures of the body, and the full range of motion),
++ Perspective (For Backgrounds and foreshortening),
++ Lighting (In paintings, film, and stage),
++ Color and Composition (Color Theory, and how to organize elements on a panel to have aesthetic focal points and clear visual storytelling),
++ Camerawork (to imagine the scene in terms of film shots is very helpful and can increase the clarity of the telling
++ Fashion and Clothing Design (Dress your characters in a way that says something about who they are, we do it all the time in life)
++ Acting and Body Language (Helps with poses and visual storytelling)
++ Mastering your Software (I use Clip Studio Paint as is has better algorithms for pen pressure than Photoshop (I also disapprove of the subscriber stuff; I used to Love photoshop before, CSP works much like it and I use it 100% now), but knowing how to use a software inside and out saves HOURS, literal hours over weeks and months, of excess worktime.)
I think this is more than enough to get you started, and from here you expand to whatever it is you need to learn to tell the story you're trying to tell 
'More on this later'
Background on me and my credentials...I guess. Tl:dr: I ramble about my art career so far.
Summary
I started at 10 with a How to Draw more Manga book. I still have it, I still love it.
I started making commissions at 17 for literal pennies on dA cause they recently launched points by then.
Don't do that. Don't sell work for pennies like me. Later in college I discovered people don't really know what they want and they would buy more commissions if I made them "your character here" things and so I made Comic page YCHs (https://www.deviantart.com/seraphicmayin/gallery/69016239/old-ychs) They're free to use for literally anything even, I don't care what people do with them if it helps someone out with drawing and comics.
Lesson: Always hustle for a better way. There's always a better way that we either haven't discovered or invented yet. I think I accidentally innovated the comic YCHs cause I haven't seen anyone else do it...i just wanted to make money from my art and literally nothing else.
I have a Bachelors of Fine Arts degree in Animation simply because it felt like the most labor intensive art degree. It allowed me to learn traditional drawing, composition, film editing, visual storytelling, rudimentary acting, Adobe suite, basic programming, and 2D+3D design and animation. I did it because I knew it would be hard...and it would give me the skills I needed to survive.
After College I did the scary thing and jumped in with both feet into making money from my art and stories alone.
From age 22-25 I struggled majorly and failed more than I succeeded, again and again and again.
I flailed about learning story, finishing comic one-shots, failing at a longer comic, failing at two more comics (which are on indefinite hiatus now), studying like mad, falling down, getting back up, crying and feeling quite certain I'd never make a living out of this, wiping away the tears and getting angry instead, using the anger as fuel and continue to study like mad.
Rinse Repeat. Realize I had finished two one-shots, used the falling out with a friend as fuel to submit a story for the Incubator contest in 2018.
Spent 5 weeks writing a story from scratch and studying screenplay at the same time, in the last 2 weeks I scrapped the ENTIRE plot, rewrote it in a week cause I did all the background information writing in the first 3 weeks and somehow won the incubator program two months later after convincing myself I had failed and should start on my next comic instead. When I got the email, I only got as far as reading the header of something like "Congratulations you've been chosen for the Incuba-" when my eyes got blurry and I literally felt my knees give way and I cried for a whole minute and half on the floor before I managed to read the email.
I was scared as all hell accepting the contract and working with Tapas that I'd fail in some way and ruin everything. Didn't ruin everything thankfully. And I was able to create and finish Swaha within the course of 12 months from start to finish, by myself and with the blessed guidance of my editor. For the first time in my life, I was making a living from comics.
Failed to land a premium deal with my next comic, Bone's Tarot, decided to make it anyway. It's doing well, thank goodness.
Shortly after failing to land a premium, I was invited into a contract to do Linework for a premium comic. Accepted cause I was back to making very little monies. Found out the team of the comic needed better organization and took it on myself to make a teamwork process so everyone knew what was going on-- guess it caught the attention of Tapas cause...
Month or so later, got a second contract expanding my assistance work to 3 more comics. huzzah, making a living wage again.
Months again later, got my third and current contract. I'm now on 6 different Tapas comic projects. Of those, I"m basically project manager (schedule keeper) for all of them, Editor for 2, and recently art assistant for just 3~.
Every day now, I work on Bone's Tarot, my Webtoon's contest entry, and keeping up with the full time work I do with Tapas as an independent contractor. I still have moments of insecurity. What if this is my peak? But if experience has taught me anything is that there is no peak. I can always get better at something. I'm going to peak when I die. Nothing less will do.
