I retired in 2004 at the ripe old age of 52. It wasn't until then that I became interested in MRR. I would have enjoyed it full time, but I had other incursions. I joined a choral society, eventually becoming president. I joined the local board of Crime Stoppers. My wife started shopping at a grocery store under a volunteer organization that phones shut-ins, takes their orders, shops for them, and the store delivers and takes payment. I joined them two years ago. We have property, and both the climate and the things we like to grow take a lot of time in repairs, prep, cleanup, moving hoses, weeding, mowing, etc.
It is most often the case that you fill your time as much as when you raised a family and built a career. You'll meet people, find yourself in Probus or in Elder College. You'll join a club, maybe a couple, you'll discover photography, find your roof needs the fascia plates replaced, and that means the gutters have to come down...without ruining them. Bitchute and youtube will take up some of your time. And on it goes. Oh, and you'll spend an increasing amount of time in doctor's waiting rooms, or at emerg, either for your own sake or for your squeeze's sake. Soon enough, it will be harder to bend over to tie your shoes. You'll find that things change a bit every day, and not always for the better.