Go volunteer or do PRN. That’ll keep you busy enough
Learn to fly fish. Go walking. Learn to paint or photograph
I go visit small towns. I walk the cemeteries learn the history eat at the local diner
Work the early hours at a bakery/donut shop. Sometimes they have to have someone up and working at 6 AM. A lot of oldsters are up at that hour anyway, and don’t mind working until the 10 AM shift comes in.