I drive our motorhome, a 40' diesel pusher, about half the time. I learned through (forcing myself to do it) practice. We use radios to communicate when backing. I started by learning on the interstate just as mentioned before. He pulled into a rest area and we swapped places. I drove, thinking I was going to pull over at the next one but I got comfortable pretty quickly so I kept on driving. Then I moved on to the 4-lane roads, then 2-lane. I learned to watch my rear - that tail swing can get you in trouble - by practicing in parking lots like Wal-mart and I also learned where the front in really is the same way. We took orange cones to a parking lot and I practiced until I was comfortable and had marked my spots on the dash for the front, camera for the back. I found that at nearly every campground someone is there willing to help. My first backing experience nearly gave me a heart attack on the spot. I moved by inches but I had watched a video on where to line up online with the corner ten feet from the rear. I did it! Man was I excited - I hadn't wiped out anything, anyone or our coach. It took forever but no one said a thing! Just helped me out. Once you learn to drive, you will wonder why you didn't do it earlier because it really is a fun experience.
I also learned to operate the systems, they are really easy to learn. Now we share the duties but I could do it by myself if need be. You will do fine! Just ask a neighbor, they will help you figure it out if you have any problems.