Do you volunteer?
When I retired 18 years ago, I hooked up with my local Habitat for Humanity affiliate. I have spent many hours building houses, in the process making some good friends and learning some skills.
Because of my advanced age (I was 62 when I retired, so you can figure it out), I am somewhat limited to what I can physically do. But I transitioned into tool repair. With 2 construction sites and 38 houses being built, you can imagine the number of tools which get broken!
This has been a very rewarding experience. Think about sharing your skills and helping your community.