I recommend trying some new sports. Check out community centre drop ins or beginner leagues. It is a great way to get some exercise and meet people.
I just started playing volleyball in my late 30s. I never played a lot of sports as a kid, and being short, this was a weird choice. I was really intimidated at first because it has a fairly high skill point of entry, so I just started passing to myself and serving a wall in a park during covid to get some exercise. Eventually I found a drop in at a local community centre and despite being the worst one there by far, the community was really welcoming and I kept at it. I've made a bunch of new friends in the community and l absolutely love sports now.
While I acknowledhe that I had some pretty awful math teachers, I would like to add that explaining math concepts in an edited video that you could spend a lot of time making has different demands than babysitting/teaching 30+ students at different levels multiple times a day with little prep time.