It's.. different.
Definately room for improvement.
First of all, anatomy the golden rule of drawing, anatomy, anatomy. This is the proprtions of your character compared to other parts of it. So his head isn't as big as his body or something. Big note: OMG YOUR HAND'S AS BIG AS YOUR FACE. Your characters hand is as big as his... nose.
Body positions: Your guy is so.. unnatural, looks like he broke something bad. Learn how joints work, i.e look at a mirror.
Shading: Your attempt at shading is passable but not great. When using shadow not everything is the same colour, some parts are darker then the others.
Your not a bad start though, you can draw a straight line. Keep practising because practise really does make perfect. :O