This is really good work, dude. Great job.
I'm not sure if this is your character or somebody else's, but regardless, it's a pretty solid design. Very solid colour palate, and I'm absolutely in love with the highlighting and shading. Really good painting. Good posing as well. I love the whole hand-painted look of the whole piece.
I think it's already great, but if I had to give any sort of criticism I'd say maybe the text could've been placed better somewhere where it's better complimenting the overall composition? But that's just a really minor thing, tbh.
Great work!!