Thanks @mau.wamp .wamp! Whiie they're rough sketches, I took my time and tried my best to reproduce the planes. Thats the only way for me to understand the main structure of the head 🙂
So here's another head. This one I am going to try to paint to see how well I can make something more polished on this Samsung tablet I got recently. It works for sketches, but will I manage something a bit more ambitious. We'll see!