>>5809829muh advice:
use 3d models for stuff like your picrel. tracing photos might get you caught, this won't
clip studio paint has this feature, there's also design doll, I've seen some use gmod
alternatively you can take some reference photos of yourself and slap some tits on (or not) if you don't hate yourself too much
since you want to do porn, pausing in between some vids when the view's nice and tracing over is the way to go
with faces, do simple moeshit - big animu eyes, dots for noses
there's tons of references out there, even 12 y.os an do this part
for coloring, do simple flat color + cell-shading (or no shading, slap some texture overlay and you're good - just look at 2d disney)
hope this helps, don't kys over this shit