If it were me. Make a copy of this and then make the copy a constant work in progress. Just something to fuck with when you're bored.
By itself, it looks great. Though I think the metal on the suit is a bit out of place. Kinda like manipping on top of a watercolor. I think more attention to the rest would even it out and make for an insanely detailed image. In my case....... that's why it'd be a constant work in progress. Learn as I go.