How can I draw a lot when I don’t have money for more storage in my tablet, and when my screen art tablet has too much stuff in the way
Paper, for starters. Drawing digitally is great for convenience's sake, but I honestly do think it's worth it for every aspiring artist to work on paper when they start out: there's just some je ne sais quois about the tactile feedback, as well as the level of commitment it forces out of you. Sure you can always erase or use white ink, but the lack of a full-blown undo feature really helps build confidence and forces you to move forward.
With that said, working digitally, storage space shouldn't be that big of an issue. You can buy a cheap little 16 or 32 gig flash drive and store hundreds of high-resolution work files on there, to say nothing of the lower resolution flattened images. As long as you have a USB port available to you, you can store your digital work without issue.
I want to draw something but I’m scared that people will hate my art?
The fact that you're bringing this up at all tells me you're starting off on the wrong foot. This isn't an uncommon problem, but you need to ask yourself a very important fundamental question about WHY you're doing what you're doing. If you only care about people loving your art, then you're in the wrong game.
Make your art because you love making your art. People being fans of your work is a bonus on the side.
People are going to like your stuff, people are going to hate your stuff, people are going to ignore your stuff. That's just the nature of what you're doing. There will be ups and downs, fans and haters, dry spells and surges. Get used to it, they come with the territory, and you can not use something so inconsistent as a metric for your motivation.
Make your art because you enjoy it. Whether people hate it or not, you didn't make it for them, you made it for the joy of creating something you're passionate about. Focus on that.
What is your writing advice for people who want to make stories?
This is an incredibly broad topic that I can't even hope to fully explore here. There are entire 4 year college courses that are literally nothing but advice for people who want to write.
The guiding star here is to make stuff you would enjoy. Make things that YOU think are cool, not what you think you 'should' make, not what's popular or conventional, make stuff that interests you.
There are a TON of youtube videos, essays, blog posts, and discussion forums centered on nitty-gritty details of writing technique and characterization and narrative structure and all of that, and you absolutely should go consume those, but the primary thing to worry about, especially as a newer artist, is maintaining motivation, and you're not gonna be able to do that unless you're making stuff you WANT to make.
How can I practice making short comic stories (like a complete comic with no cliffhanger or “to be continued” area in the end)?
3 panels.
Stories have a beginning, a middle, and an end, so make one image for each of those things, boiling down those 3 major elements into the bare minimum possible for representing those elements in order to practice going from one to the next.
When I was in college, they had us do an exercise where we made a 3-page comic (page 1: beginning, page 2: middle, page 3: end), then forced us to tell the same story in 1 page, then again in just 3 panels. It's a great exercise to force yourself to cut away fluff and reduce your story down to the bare minimum necessary to tell it.
I would suggest doing something similar:
Come up with a character, give that character a goal, then have them accomplish that goal. It doesn't have to be fancy or complex. It can be something outright mundane and boring, it might even be better that way: It's not about whether the story is interesting, it's about you getting practice with the tools at your disposal to portray a sequence of events in a clear, readable, efficient fashion.
What can I do if I feel stuck in a rut in writing, as in not writing or feeling nervous that you writing isn’t taking you anywhere because the character is stuck in one place not doing anything or taking your story (such as a problem then situation and then solution), and then being boring because your character goes back home with no problem to go in head on?
Based on the way you've worded this, it feels like you've got something specific in mind that you've struggled with. The more specific your problem, the more specific the solution, and I can't help you out with your exact story without knowing the details.
As for being stuck in a rut and feeling like you aren't going anywhere with your story, I refer to the above answer: Cut the fluff.
Boil your story down to the bare minimum. What is the next item on the agenda? Make that thing happen. It's okay if it isn't perfect: You can always fix it on the next page. If your story is a little clunky, that's fine, you can learn from that and improve next time. The important thing is to keep the story moving forward, keep finding interesting things to write/draw.
The more you do it, the better you'll get, but you can't get that practice and experience until you actually put pen to paper and do it.
Also refer above to the first answer: Make things you find interesting and fun, not things you think you're 'supposed' to do. Oftentimes when I feel like I'm spinning my wheels in terms of storytelling, it's because I'm including stuff that I think "should" go between point A and point B. I don't actually always need those, and even when they are necessary, they can usually be trimmed down pretty extensively, allowing me to feel like I'm moving forward at a faster clip, thereby giving me a sense of progress.
How can I write my story when I feel upset, and can’t find any advice or ideas from the writer itself?
This one is a tricky balancing act. On the one hand, you don't want to burn yourself out or push yourself too hard to create stuff when the creative juices aren't flowing: it'll wreak havoc on your mental and suck the joy out of something you're supposed to love.
On the other, you can't just sit around and wait for inspiration to strike, or else you'll never get anything meaningful done.
Literally anyone can create something when inspiration strikes: that's what inspiration IS.
The difference between someone who is an artist and someone who isn't is making art, so make some damn art already.
If you want to do this just for fun, then there's no need to push yourself to really any degree: do stuff when you want to and don't worry about it.
However, if you're serious enough to be here posting to a community of artists, looking for advice on how to improve, then I take that as a sign you're serious enough to go a step further.
Treat your art like working out. Get up and do it regularly. Don't sit around and wait until you just 'feel' like it.
Even if it's just a little, even if you don't really feel like it, even if you aren't really enjoying yourself, get up and push yourself a little to create something better than you could create the day before.
Sometimes you don't wanna get up and go to the gym, but you do it anyways because you care about doing it. You do the thing you don't necessarily WANT to do because you know it's what you NEED to do.
If the long-term results of improvement are what's important to you, then you'll have some miserable days where you hate it and don't have 'fun', but you put in the hours anyways because you care more about being a better artist/writer than you do about whether you enjoy it right here right now.
What can I do to be a writer who writes stories in my journal and make comic stories from there (writing with words not the comic picture stage at this moment…)?
You'll have to experiment and figure out what works for you. Some people are 'discovery' writers, who discover the story as it's created (I'm very much so a discovery writer myself, almost to an extreme), while others are 'outline' writers, who plan their stories extensively ahead of time and write out everything in broad strokes before going back in and refining each section.
Try writing some outlines: Do you work better just throwing out a jumble of ideas and blurbs with arrows pointing to one another like some crazy conspiracy theorist, or do you prefer to keep it extremely tight and organized? Or do you prefer not writing outlines at all?
Try writing scripts, see if you prefer breaking things down panel-by-panel, or if you're more comfortable with a screenplay style that lets you come up with panel breaks as needed?
There are a million different ways to plan, outline, script, and thumbnail your comic, and everyone's gonna have their own personal way they like doing it, so this one really comes down to experimentation and finding out what works best for you.
My family keeps limiting me to do whatever they want me to do and they don’t take me seriously
Don't expect them to start taking you seriously because you decided to make comics, and don't make comics because you want them to take you seriously. Don't make comics because you want to make money or support yourself either.
In addition to being very unlikely, it's also just not healthy to get into an artistic field for the purpose of making money with it. If you need to have a regular day job to pay the bills and you make comics on the side, that's okay. If you can't dedicate much time to making them because you've got other stuff to handle, that's also okay. It's not about hitting some arbitrary threshold or deadline, it's about doing something you're passionate about because YOU care about doing it.
Don't make comics for someone else's sake, don't make them because you want your family to take you seriously or because you want to make money doing it. Make comics because you love making comics. Full stop.