It was a good effort, but I strongly implore that you study anatomy books, and other such art books. Keep practicing. If you're going to draw digitally, I suggest investing in a Bamboo Wacom Tablet. They're about $100 or so. If you're really serious about art, then get a Wacom Intuos tablet.
This may be an improvement over your previous work, as such, keep it up. I suggest making an account on conceptart.org, there you can make a sketchbook where other artists constantly critique your work. It's a good place to improve.