convert beginer unity playercontroller code to a state machine

For the last year, I have been making a small unity 3D project to learn. its an open world platformer Im trying to make. as it got a little bit bigger, the beginer methods I learned started to become bad habbits. Right now I have a player controller script that controlls actions like jump, roll, attack etc. The issue is it has multiple conditions that controll everything, and the code has become very messy.

I just want it all cleaned up, and organized into a state machine, or hiarchal state machine, useless code removed, etc. I use rewired for controller input, and do not have full kbm controlls set up yet.
here is a link to view what i have right now https://codeshare.io/eV1P0b
Please open that link