Heres a head I've been working on for the past 1hr and 30mins
I have been fiddling around with the air brush and the dodge/burn tool in order to try find something effective. I would be very greatful if you could give me some good hints on trying to perfect my shading ^^.
CnC.

ok i haave some tips.

For airbrush:
1. First before you start click the + that's by brush dynamics.
2. uncheck pressure- opacity | check pressure-hardness | Check velocity-opacity, hardness and rate
3. leave all the other stuff unchecked and put it on the fuzzy brush.

that should make your shading a bit smoother, for extra clean look blur it a bit.

also i like the shape of the eyes but idk if that thing below it is suppose to be a mouth or like a mouth piece. but gj ^_^

Dude it look pretty good so far. nice job.