I wonder Why has so little resources To this important topic؟

i create a third-person shooter game.its very important to me that my third-person character have head look controller and dynamic hand bone for put the gun up and down when purpose of the sign.

I was searching too much but i did not find anything useful about this topic It seems this is a secret course!!!can you guys help me to find or create a tutorial that explain all of the needed to this topic. i want Something like this.

Thanks in advance.