https://imgur.com/a/ZX4i5 Here is my WIP of a spartan head.
Any tips? :3

The mapping is pretty bad cuz the eyes and the whole middle of the head is too high up. Also the red thing is not mapped right too cuz it will just turn in a distorted circle on the top of the head but rather it should be going up to both sides and then down on both sides a bit.
Shading of metal aka the helmet is not good . You should look up some metal shading and highlighting tutorials.
I'm too lazy to look up a mapping thingy but you should be able to find one if you google Toribash head mapping or something like that.
But anyways here's some cnc hope it was helpful.