Very cute drawing. C: The shading looks all right, and you did a pretty good job giving the hair texture. I agree with the others, practicing anatomy will be really useful. Trust me, it helps a lot. xD
What program do you use? I'm just gonna take a guess and say Paint. It looks like Paint... Seriously, I respect you. I can't draw on Paint to save my life... Keep it up, DL! I can't wait to see more of your art. ^^ <3