Nice, for a first. From the looks of it, I assume you weren't going for anything super realistic.
Crits:
Her jaw is a bit too square for a girl. I mean, of course there are girls with man-jaws, but they're not too attractive.
The ears look a bit low. From my understanding, (Correct me if I'm wrong.) ears should go from the top of the eye to the bottom of the nose, positionwise. Generally speaking, of course.
Is one eyebrow up and the other down? It's hard to tell; the eyes are the same shape. The down eye should be a bit more flat on the top, and there should be a kind of meat above the nose. Em, that's not what I meant. It should be....furled?
Gah, whatever.
The eyes look pretty wierd. The glare is inconsistent with the rest of the image's lighting.
The lower cheek area looks very plain...Like a plane...all flat, see?
I don't know about you, but I don't generally frown disgruntledly when I'm bored. She looks like she's about to hurt someone.
Sorry, I can't really help you with the hair, but I can tell you that the gravity-defying bang looks wacky.
Oh, and...94 colors!?