I feel a bit stupid for only now realizing that I can use 3d models to help in my creation process.
It was by watching how some pro artists I admire working that I realized that. I'm using this software called Magic Poser, which unfortunately only has a version for mobile. I'm using a computer emulator for it, and it's working perfectly for me.
I wish I learned about this years ago. It will surely make my work much easier.