Tips for creating a 3D fighting Game

Yeah, I know…
the problem is that all the most of video in youtube make tutorials of fightings games like:
Tekken,street fighter etc…
or
A hack an slash like dark souls
I’ve been looking for tutorials the last few days and nothing.

I can make a list of issues :

1-Set up the 3d movementent with a Camera following 2 targets

2- Players targeting each other

3-Combo System

this are the core issues I have.

thanks for your time.