Encouragement, Thoughts? Newbie is scared!

Try renting for a weekend and see how it goes. There's tons of RV info online, and the trip will seem less daunting once you've studied up a bit. Perhaps your husband or older son can join you at the start of the trip, reducing your workload while your learning curve is adjusting. Stay at campgrounds with hook-ups & restrooms/showers, and it's also a bit easier. Scheduling the trip so your driving is limited to 250 - 350 miles a day, and staying put for a few days at a time when needed, will make it more relaxing. Not going as far away is another option.

Don't worry too much about the potential difficulties, they may not happen, and if some do, just consider them to be amusing anecdotes.