1. You could've built both arms at the same time if you had extruded the faces together, because now one arm is probably going to end up looking much different than the other.

2. When you're posting wires you may want to use the wireframe on shaded mode (Shading>Wireframe on Shaded) instead of the straight wireframe view as its not messy.

3. I would've modeled the hair separately, I just think shading that will turn out to be a pain in the butt later on.

Good Luck and Have Fun.