1. Started playing rugby again after 12 years. Good male relationships. Physical exercise. A sense of time passing and a season in the year. 2. Violin. I wanted something I could spend ten years learning. And a creative hobby but that worked with analytical approach.
Time? Both take a lot of time and effort - but maybe less than you would expect.
Rugby: Email ten teams in the local area, attend the training of the one who was friendliest in their response. Training twice a week and a game on Saturday. I now go to the gym as well. All the above is optional.
Violin: Cheap violin is £100. Online lessons are cheap and convenient. After a year I bought a more expensive violin. I practice on my lunch break - little but often.
Do it. It's a made a lot of difference to my happiness.