here are a few test renders
pic1
I really like the geo and texture of his cloth. I’m sure it will look really nice with shadows for final rendering. As for the skin texture, I would add more colors. For the time being it seems like you used only one color and lighten or darken it. And also to have shaper highlight for the eyeball shader is more effective. Very cool character man! Looks like he is a fun character to animate. Make him move!