Lookin' pretty good! The proportions of your nose and chin are great, when you draw the top of the head don't forget that it is one nose length from the brow. His eyes are a bit small and a little far apart. On a straight-forward face there is about one eye-length between each eye.
Basically here is a thingy of head proportions. I know the style is more realistic, but proportions for the human head are a good thing to build upon.
Thank you everyone for your comments, I'll keep posting how my drawing is going.
I've decided to draw it again so I have one in colour and one in black and white, so I might be sometime before I finish both.
If anything, ALWAYS draw the shape of the head FIRST. C: The eyes are always one eye apart from each other. (You should be able to take one of the eyes and fit it perfectly between the other two with less than a millimeter of space.) Drawing the head first makes everything a whole lot easier. C: