With a small class C, it is not that difficult. A few main points to remember:
1. Your C is wider than a regular vehicle. Pay attention to how much width the parking spot has before parking.
2. Even with a rear window, you will not be able to see things behind you that are under 3ft tall (depending on the window, that may be taller). That includes stupid little sports cars that are being driven by stupid little idiots who think riding on your butt will get you to move over but in reality just makes it impossible to know they are behind you.
3. You have to pay attention to what is ABOVE where you're going. Your C is 9.5 feet or taller.
4. USE YOUR SIDE MIRRORS. If you have a hard time getting used to the side mirrors during the occasional RV driving moments, remove the rear-view mirror in your daily vehicle and use only the side mirrors. Also learn how to set your side mirrors to get the most view on each side (rather than seeing the full length of your vehicle and barely nothing of the lane next to you).
Practicing in an empty parking lot helps. Get used to backing up on your own. Yes, sometimes you have to get out of the vehicle and look at how you're positioned before backing up. But, if you RV solo, you can't guarantee that there will be a spotter - so just get comfortable doing it yourself and enjoy it when you have a spotter.
If your street is like mine, it is a small city street. This means that you might not be able to turn enough to get the C lined up with the driveway for simple straight backing (especially if people park their vehicles on the street). If that's the case, learn how to "dip" into the driveway before turning away - it can give you enough extra maneuvering room to back in without a bunch of back & forth.