Not OP, but I’ve taken up training Muay Thai and it’s a lot of fun. It can look pretty intimidating from the outside, but everyone I’ve met at the gyms here in Brooklyn have been super welcoming and kind.

I also have had a long standing, 5x per week yoga practice which is a great way to strengthen and open the body. I’d look for a yoga school that mentions ashtanga if you’re looking for something more intensive, it’s a challenging practice.