I want to commend you for learning and using so many different apps - while at the same time I have to ask: why?
Why didn’t you just do it all in Blender?
I’m not saying you should, or implying that you are obligated to, just genuinely curious why you felt it necessary to invest time/energy in so many different directions to achieve your result.
Because the more proprietary your workflow becomes, the less compatible it is with others in a team or studio setting.
Really nice work here. Whatever or why-ever your workflow, it seems to be working out well for you. At this point I’d say the only things left are to decide on a storyline, make a storyboard, and animate this guy! I hope to see you do something with this character in an animated form. There is much potential here. I’m already impressed, but would love to see you take it to the next level.