Congratulations on losing 100 pounds that's absolutely nuts. I'm 35 too when this covid craziness stops I'm going straight back to my old muay thai gym. You won't have any problems in a good muay thai gym. Look for a gym with a mixed bag of people. Everything from pro/ammy fighters and your older "tough guys" to teenagers and women looking to get in shape. What that tells me is that experienced guys have control and there is a good coach there making sure people develop their skills without unnecessarily hurting each other.
