Once a week try something different. For a year.
The free and YouTube ones, do at least two times. E.g. everyone praises Yoga With Adrienne, but she's sometimes too chirpy for early morning me. Try a different person teaching.
Swimming, running, YouTube ballet fitness, hula hoop, clubbercise, Zumba, ice skating, pole-fitness, fencing, jogging, weights, tai-kwondo, netball, capoeira, aqua aerobics, lengths, Yoga, pilates, body balance, bums and tums, hockey.
For the group classes, if you don't like them try one more time with a different instructor.
At the end of the year, you would have tried 50 things. If you enjoyed zero, then you've got bigger issues, e.g. anhedonia.
Some will cost money, yes. But what will you end up paying for poor health if you don't find something you like and end up sedentary?