you just have to keep trying! we all have to start from somewhere.
to create great stuff, first you need to do some good stuff. to draw good stuff you need to have drawn okay stuff. to draw okay stuff you need to have drawn pretty bad stuff.
everyone works differently therefore improves at different rates.
as long as you find drawing fun, i know you can do it!
perhaps you might want to try an improvement meme? pencilcat.tumblr.com/post/2742…
see how that goes and be amazed at your process!