Hey there, if you want a lil advice I'd say you should try to work on your line control first, there are plenty of exercises for it like just trying to make straight lines freehand on paper, or make 3 dots and try to connect em in one stroke, be sure to use your whole arm while ya do it, feel it from your shoulder.
Then I'd recommend a simple anatomy book to help you in drawing your characters in poses and such. Figure Drawing for the Artist by Steve Huston is a good one and How to Draw Comics the Marvel Way is very good for posing and very easy to understand. Art is a skill, remember it takes dedication and plenty of references to improve at the thing. (even if I'm not the best example of that)
But the best advice I can hand off to you is just draw a metric ton, do lil redraws of art you like, draw tiny lil objects around your room, little scrap doodles you'll just toss afterwards, all that stuff. The more you take into your head and put down to paper the more you can improve yourself bud!
Bobtheshovle
I recommend this https://ornery.newgrounds.com/news/post/388624 and if the link doesn’t work, this is what it’s called Ornery's Handy Dandy Scouting Guide
XenXenEc
Thank you alot, that one actually helped me. I'll try doing this :)