I hope you guys don't mind me bumping an old thread.
I know how you feel, man, but you just gotta keep practicing and trying new things. The less you compare yourself to others, the better off you'll be. Trust me; I've stopped comparing myself with better artists and instead study their work to improve my own.
Anyhoo, I finally drew something and it's not le clean.

EDIT: I did this one not too long ago and never posted it.
