How the fuck do I texture in PS1 style?

I can model the character, but I am absolutely lost on how to texture it. I usually only handpaint my models and never work in low poly, so I'm clueless. Where do I even get the fucking textures for it? Every tutorial I found is just about how to do ps1 style furniture. How do I texture a more complex character that needs clothes, a head etc? Every texture I look at that could work is copyrighted as well.

Please help I been stuck on this for ages.

I do have substance painter.