It was one year ago that I went through my surgery and RAI. They found cancer in my thyroid as well. Like you, I did a lot of research and read every message on this board. This truly is the best site for discussion. What I found from my personal experience is that the whole ordeal was fairly tame. I only missed three days of work from the surgery. I stayed in the hospital those three days (Wed-Fri), but was fine to go to work (with a scarf) on Monday. Assuming your female, I also bought a collection of necklaces that could be adjusted to fall right over the scar once the bandages were removed. Now the scar is so clean, you can't even notice it.
RAI was just going to the hospital and taking a pill. Luckily, I only have a dog, that my son took for a few days. Rented movies, and stayed inside.
My vocals were weird for a month or so. Never thought I would sing again, but probably within 4-6 months, I could hit some of the old notes again and am normal in that regard as well.
Still feel "tightening" around my throat from time to time, but nothing too bothersome. Diet and exercise should be ramped up. It's tough with virtually no metabolism. I will probably always be a little heavier now and I'm starting to accept that.
Good luck to you.