I refuse to talk about odds or the like because everything outside your choices and your actions is outside your control. The world owes you nothing and you owe the world nothing. This frees you to choose exactly who you are and most importantly Who You Want to Be.
Now, there are no unrealistic Goals, merely unrealistic deadlines. The thing to do in this case is be specific about your goal for a career in webcomics and write that down.
Then write down every skill and knowledge you need to build the 'career capital' (the stuff that makes you able to work in webcomics) to be considered not just average or competent but Good, even among the Best. Because it's those people who make a career from creative work of any kind. And you CAN be among those. It all depends on how badly you're willing to work and learn for it and if. You have strong motivations for it as well.
If you're only in it for the money and attention (not assuming that you are), neither of which are guaranteed (indeed the future never is) then I'm afraid it may not be the career for you. But it is a fun pursuit nonetheless. I'm not here to discourage nor encourage you, only present you with the tools that have helped me make comics a full time gig.
The core skills as I see them is this: Learn to draw how you can draw Well, and learn to tell the stories you can tell Well.
Everything after producing the product that is your story is learning how to put it where people can see it, and there are countless ways to do that but ONLY after you've created something to offer in exchange for attention and money.
Realize that if this is a path you seriously want to pursue there is no end date for learning and getting 'better'. Knowledge and increased skill will be a lifelong pursuit. There will however, be a tipping point at which being a web comic creator will sustain your lifestyle.
Since you're still at the beginning of your path, stick to the job that's making you money and figure out why you want to get into webcomics. Here's a good exercise:
Ask: "What about making webcomics is important to me?"
Answer with the first thing that comes to mind.
Ask the question again, replacing the subject with your answer.
Do this process until you're seven layers deep in the question.
Asking What is important instead of Why will help you expand your thoughts and uncover your deepest motivation. Least, I hope it helps.
I've found that this exercise has been helping me get up every day to work on my Incubator Comic, which is well on its way now after six months of work, with 4-5 months more to go.
This is still step one.
Once you know your reasons to pursue this goal, write out what the first comic project you want to make is. Then write out what exactly you need to learn to make the best story and art you can.
I've studied the following books and from these resources (and more that I can't remember) for years and for years to come:
Save the Cat by Blake Snyder (screenwriting book, helpful for beginner advice cause comics are a visual medium more akin to screen based stories than novels or plays
Story by Robert McKee (DENSE and thorough breakdown of the DNA of stories and how best to write scripts for visual mediums)
** *The Hero with a Thousand Faces** or any info on Joseph Camp bells work with archetypal stories.
- Any nonfiction works in areas that deeply interest you. This will give you a base of random knowledge you can draw from to add content that grounds the details in a story.
- Online figure drawing resources and setting aside time to study and p tactic anatomy, textures and materials of objects, fashion, etc. (I've also spent the last 15 years learning to draw and went to college for animation, but it's not necessary; you have your own path , mine is one of a many)
- Writing out an action plan for the execution of the goal. Focus more on concrete steps rather than deadlines. Have deadlines of course and challenge yourself, but at your own pace. Take the project and break it into stages and chunks smaller and smaller until you can have weekly and daily goals, which are best written the night before.
- Books like Be so Good that Can't Ignore You and Deep Work by Cal Newport helps in the meta side of how to approach work.
- Research and learn about Deliberate Practice. Our field is a winner take all market. You either create a story that touches the audience or you don't. Thankfully there are many different kinds of stories and masters in each genre to learn from.
There are more resources of course. Like the comics that are your inspirations as well as movies, shows, and books you enjoy.. Learn what makes them good and why you love them.
Webcomics are very much at the crossroads of storytelling in terms of its medium, so the more you know and understand about it, the more you'll be able to nail down the sort of stuff you want to make.
I wish you the best even if comics become a hobby. The act of creating is among the most freeing and fun things I think a human being can do. I hope you find joy in the work of it