Can I get some advice on drawing?

I suggest looking up things like vanishing points and 3-d sketching. For the hair, that's probably where I can relate most. I just do a simple style, since I can't do any fancy stuff. If you think you'd enjoy a more detailed hair drawing style, I suggest tracing or hand copying existing artworks as practice until you get the knack for it. I'd also like to add my own fav drawing video, in which the artist explains different methods of practicing: http://www.youtube.com/watch?v=Bu3ulVhO3z4