Help with an icon in progress

Help please! I've been fiddling with this base I made for a while now, but am not having much luck. The lighting in the cap is really difficult to work with (no fault of the capper, it's just the scene), and I'm looking for some suggestions or help to make it look a little nicer.

Here's the plain base:


And here's all I've been able to do with it, not terrible, but not particularly good. I can't seem to do anything about the lighting on Boba's helmet on the right side there.


Any help with this would be greatly appreciated! I'd just like to make it look overall better. I know that's vague.....

Cheers!