HHH! You definitely wouldn't want to visit the Korean spa in my area, AKA the "naked lady spa." Naked baths and hard-core body scrubs that take off a layer of skin!
https://olympusspa.com/lynnwood/
I know the feeling! Sis took me when we were on the MSC cruise last March, and she showed me the ropes. Other than the naked stuff, it was all pretty straightforward. It was very quiet and relaxing, sort of like being in a library in your swimsuit (yeah, I had to keep my laugh under control). We were given a tour the first time, and I would think that is available at any spa, so you could ask any questions you have then.
I hope you give it a try. Maybe one day on a future trip some of us can do a Spa day in Vegas!