May be. I just started. And will try to redo it better.

You have a lot of banding going on here;

All of the metal parts, above the eyes, the chin, the cheeks, and the nose.

I also don't think the dither/hatching technique used on the top section of the head really works. Lighting/shading feels strange, and anatomy seems very off, even for such a stylized piece. If I were to imagine this in a 3D view, it doesn't seem correct, and it may be due to the poor lighting.