1) well I notice that posting often gets you more followers. But followers aren't really important.
2) I'm not sure how to get more likes. But that isn't important either
3) I am not exactly sure if this is a tip but practice!
4) your art doesn't s*ck. Nobody's does.
5) well a style for art isn't even a thing. Try not to focus on it so much. Just draw what feels right and soon you'll start drawing stuff more comfortably