I was 69 when I started out, and I also had hardly ever been in an RV--maybe once with my son and his family. Anyway, I went in whole hog--sold my condo, sold my car, put furniture into storage, bought my 32;' Class C, and headed west! Half my friends thought I was nuts and the other half were jealous. My older son was worried, but my younger one was positive I would not make it 200 miles down the freeway without dying in a fiery crash. I told him I could sit in my recliner for the next 20 years and die there or take a chance of dying in that fiery crash along the freeway. I said I was NOT going to die in my recliner.
Well, it has been 6-and-a-half years later and 123,000 miles, and I am still loving it! And I brought my recliner with me, by the way. Sitting in it now, but I have a much better view than my condo living room walls.
(Scared younger son to death when he had to drop me off at the dealer to pick up my motorhome and follow me as I drove it 75 miles back to his house. Paid him back for all the times I rode with him when he was 16.)
I meet the nicest people and have made a lot of friends of other older women doing the same thing I am doing. There have only been a couple of times when I felt unsafe and both times, I just left and found another place to camp. I nearly always stay at state, county, and national parks, which are VERY safe. I do not do desert or Walmart parking, although I know a lot of other women who do.
You might want to join the many women's RVing groups. One forum I follow is
http://www.womenrv.com/forum/. It is not a club, just a group of friendly women who have a lot of experience driving RVs. Most of them are part-timers and still own homes, but a few of us are "houseless" but not "homeless." We meet up in small or large groups whenever we can, so I have gotten to know a lot of them personally.
And if someone thinks you are too old, I have met at least two women in their 80s who drive RVs.