Use it or Lose it. Don’t die of boredom.
Retirement from work should give you time to do all the things that you never had time to do because you were too busy with work. If you don’t have enough hobbies or interests to keep yourself busy, then by all means work (paid or volunteer) will help fill your time and keep your mind busy.
Sitting around with nothing to do has a high mortality rate.
I retired nearly 4 years ago, and still don’t have enough hours in the day to do everything I want to do!
Once I retired I couldn’t figure out how I got everything done when I was working! It’s amazing how fast the time fills up fast with all the things you want to do......when you want to do them and on nobody’s clock but your own! It’s marvelous I gotta say!