ArtTips or Criticism?

Hey guys, I'm pretty new to this whole... you know... graphic design thing. I can draw for the most part but I'm trying to start new things and this happens to be one of them. Can you guys check out my twitter and just pm me some tips? you don't have to follow but it would help a lot if you did! Thanks Guys!
https://twitter.com/FoxPupPaw

Pretty awesome, considering I can't draw a circle

Your art is very cool dude! Keep doing what you're doing, maybe even try selling some of it (as in physical canvases, etc) and really make something of it.