Experimenting - ProkoTV

We mentioned ProkoTV's youtube channel in class this week, and I had watched the videos already but today I watched again and tried a couple of practice goes.

I find personally, that his way of drawing the head doesnt work for me on the whole, I usually end up getting the proportions wrong...but it takes practice I guess.

He does talk a lot about shading/lighting too and I need a lot of help with that, so that's nice too.