You can attend any kind of school in Thailand on any valid visa. But, some people get an education visa, and go to a school, as a way to stay in Thailand for a while.
Everybody’s got a different idea of here. I got one about 60,000/month, Can support partner as well, although he currently works. 10,000 for rent, huge flat in a thai neighborhood. eat Street Food and at food courts. No car. Virgin active gym. Quite happy, in 4th year.
Side note, I entered BKK from South Africa via Ethiopia this week. Vaccine passport to check in. No questions about covid at bkk but health station for Yellow Fever. Scan code and fill in form. They did not verify i did it. Now i get online gambling spam every day.