See if there are squash courts in your area. If so, take lessons (commit to 5-10 lessons), and ask the instructor to introduce you to other novice players. The game is exhilerating, easy to learn, low-inpact, high cardio, and has a huge supportive world wide community.
In one year, I went from doing no gym / physical activity, to playing squash 3x a week (or more). Additionally, since I'm at the gym anyway, I am now doing gym routine alongside playing squash (something that during my 34 years of living, I'd never managed to keep up as a routine). A funny aside - I've never been a morning person, but I've been trying to "fix" that by scheduling squash games with people at 05:30 am. It "stings" in the morning, but it's incredible how awake you are at 6:30 after having battled it out on the court at full blast. I might flake out on myself to get to the gym that early, but I won't flake out on another person I committed to. Your mileage may vary, but just sharing something which (finally) worked for me. Good luck!
(Just played an hour of squash, 2km rowing machine, full workout - all before breakfast)