I spent an embarrassing amount of time on this picture, and it still looks terrible. Some observations: 1. I can't draw. 2. I can't shade. 3. I should never try drawing anything ever again.
I tried to figure out how shading works as well, but that failed. Oh well, it'll do for an avatar.
No, seriously, you have a lot of potential. I'm not that good, but that's what drives me to keep practicing, so I can get better. Just practice, you'll get results^^
er, sorry to waste your time...