Put a lot of fuel in it and drive it!
Mess around with turning on/off ESC.
Play with tyre pressures.
Doing your own maintenance can be fun but i'd recommend looking but a service manual and finding correct torque specs (definitely borrow/rent one).
Oh and did I mention driving it? Plan routes with differences in elevation, speeds , turns. Take it auto crossing or tacking. So much good information on this forum.
One thing that does not get talked about is driver mods. I am still learning to left foot brake and trail brake properly. Checkout out sim racing or something like driver 61/Team O'neil on YouTube