His eyes are a bit wonky (looking in two different directions) and the front part of his skull is squished inward a lot, but otherwise not a bad render, especially if its your first actual human. The depth and the shading is pretty good, though your line contours are kinda confusing, can't tell if you were trying to hide your pencil marks (making it more photo-realistic) or were trying to emphasize them (as in stylized)..
If I were a teacher, I'd give it a solid B+ if not an A- if this was your first attempt at a real person.