/jp/ - Otaku Culture

Please explain to me the structure of an anime face from the ground up. As you might be able to tell from the image here (my scanner glitched, twice, while scanning, so the eyeline is skewed, but whatever) I have absolutely no idea where to place the eyes, nose, and mouth and how to size them to make them not look awkward. I also get the feeling that her air intakes are too small, but that's not really important; I sketched this in class while daydreaming so it wasn't done from reference or anything. The point is that I don't understand the anatomy of an anime character.