From the lines around the eyes, I'd say it is a clown. In which case, it looks like the rubber nose should maybe be smaller, further to the right, and shaded. Right now it looks like a flat disk sitting on his cheek instead of on his nose. Still, the drawing is better than what I usually do (not that it's ever stopped me).
Good shading on the body, and see torg's comment on the hand. Hands are complicated bits, and a single failure can make them look goofy. Unfortunately, the only solutions are time and practice. There are lots of books, CD-ROMs, and classes out there if you need direction for your practice. And there are wooden model hands you can get if you want a static model to examine. Or take digital pictures of your hand or someone else's hand if you want a static image.
