I am not retired but have a lot of down time with work in the summer and fall now that many of my business clients have retired & sold out, and I haven't been able to grow my practice with the extraordinary time spent caring for mom over that last few years. She ended up 2 months rehab starting in late March, and then about a month ago moved into a memory care assisted living home. I still don't have free time with now the hospital visits she's had and visiting her most days (hour drive round trip), and now I have her house to clean out and prepare to sell (70 years of "stuff", OMG!)
Other than that and the normal mundane tasks of cooking, cleaning, laundry, paying bills (ours, 2 businesses, & mom's), I don't have that much free time. I do pop in here each day, even if briefly at times. I try to stay awake to watch about an hour of TV with husband in the early evening, but I do sometimes doze off for a few minutes. When I do have some time again, it will be spent on hobbies such as knitting, spinning yarn, reading, biking, and I do walk at least an hour and anywhere from 3-5 miles most days, or maybe some fishing again. I haven't had a vacation in over 10 years, so maybe I'll get a chance for some travel at some point too, or enjoy going out on our bass boat since I haven't had time to fish either! I used to own, care for, and ride horses, but my back injuries put a halt to that and is now just a pleasant memory.
My most recent hobby that I really, REALLY enjoy and that is quite addictive is shooting sporting clays (aka clay pigeons to us older folks) with shotgun, and I've also learned to reload shells to complement that. I usually shoot in a group with my husband, brother, a friend, and sometimes other family. As the most novice of the group, I'm advancing along well and just bought my second, better quality gun that is off being customized to fit. I've read that it is a fast growing and popular sport these days. Maybe something like that would interest you?