I'm in my late 30s and evaluating my activity level; 150 minutes of moderate to intense (120bpm) exercise a week is what the gov recommends; probably what I got

I'm in my late 30s and evaluating my activity level; 150 minutes of moderate to intense (120bpm) exercise a week is what the gov recommends; probably what I got as a kid or in my 20s, and what I'm not getting now so Not a money or technology problem, likely a social one 1. Go to a running store and do a group 5k 2x a week; develop friendships; eventually move to the 10k level 2. Join a sports ball league (tennis?) for 2 nights a week 3. Workout to get better at the above