Do whatever you enjoy most. Doesn't matter if it's good or not, as long as you enjoy doing it. Practice will (hopefully) help you improve. If you get discouraged because you're not "good enough" or people are better than you - browse the submissions, look at some of the terrible and not-so-great work that gets posted too. Those people keep doing it because they enjoy it. And you know what, they'll keep getting better at it too, as long as they don't give up. You can also look at other artist's older work, too. See where people have been and how far they've come. It's hard to keep stuff like this in perspective, but it's worth trying. (This has been your unsolicited pep talk.)