Well, tbh i came in here thinking, oh man, this is gonna suck.
I lookeed at it, and although you havent done much, it sure as hell doesnt suck.
A few tips though:
1:The render looks distorted, hold shift when resizing.
2:The bg is kinda bland, might wanna change it around a bit,
3:Read A LOT of tutorials, you have real potential man, you can clearly distinguish a good piece of art from a bad one, even when it comes to your own, not a lot of people can do that.
I cant give you specific advice yet as your still developing your style. But yeah, also I'd learn a bit of theory, flow, composition and all that, it really helps.