All right, i give up. I just simply cant pose my character, which is kind of sad, but i can not make a good rig for him to work properly, there are always some bad weights, been trying to fix it, but just nothing works. This is the pose i wanted to make, or something like that...
But overall, I'm happy with what i have done. Its been nice experience.
Things to improve next? Better topology, no need for such high poly body. Better connection between accesories and body.
Things to learn: How to make textures in substance designer (i have only used free ones that painter includes) so i can make more interesting visuals. And learn how to rig. (then, maybe even animation)
Thats all, thanks for the opportunity and good luck to all participants!