You will get more put of your time learning those skills by studying human artists than ai as well; there are full models out there fully rigged given for free or very low cost on gumroad, blender has tons of free tutorials on youtube for just about any topic on 3d with a human performing the tasks on screen.

I learned Zbrush in a couple of months just watching mike pavlovich videos on you tube, you can just search his channel for any topic!