I looked on utube, couldn't find anything on changing my 2018 Heritage rear wheel. any of u guys help?

 

FSM -use it.
Pretty simple.
The older bikes flip the rear fender forward-new bikes - create air gap between tire and ground.
Remove all appendages and accessories from around area you are working, I would list them all but everyone has add ons .
Index axle on both sides.Back off adjusters 10 flats if you have them.
deflate tire.
Push wheel ahead to get the belt off or wrestle with it as you lower wheel dwn.
In of summary, me, in attempting to articulate a pretty simple job to you over a written medium pretending I am a technical writer is
at least a way to get my day started.
I would say in all candid honesty if you have to invest in the area behind the forehead and ask "have you ever removed a bicycle tire?"
I will say if not "why not?"
"Why not"! and further add "probably this is not the time to indulge in a mechanical array of nuts and bolts that are pretty important to your life. "
Go buy a can of wax , shine your bike.
Someone else, please jump in and help him.