First Person Controllable Hands

Hello
Firstfully - I have no skills in coding. Please be specific and try to understand the final goal, as I do not know steps and processes.

!) How to make a First Person Body? I want it to jump, sneak, run etc.

2)How to connect body animations (ex - walking, kicking, jumping) with what it needs to do when receives input(WASD, LMB, SPACE)? For example - I pust “W” and Players leg animation starts.

  1. How to link original gameplay features (pooping, etc) not included in standart run&jump&sneak package of engine with input commands (desired keyboard button)?

4)How to create controllable hands? I want them to be controlled with keyboard and mouse.
Separately. To turn each one, move them, point.

  1. How to adjust player’s height? I am tired of being a hobbit.

  2. How to adjust movement speed? Tired of being a flying hobbit…

Extra little question
How to modify FOV?

Please give detailed and deep guide if you can. Thank you.