@Sally99 I have started volunteering in a community garden a couple of times a week. I also joined two walking groups on meet up.
I have had the following hobbies in my life, listed first are the longest
Cycling, reading, hiking, board games and gaming almost all my life
Climbing trees, alas I climbed my last aged 42.
Singing in four choirs, span around a decade in total but on and off
Swimming in the sea unfortunately live in a landlocked county now
Salsa, belly dancing. aerobics, goju ryu karate, yoga, running, hockey, cricket,
Knitting, Embroidery, Flower arranging at church and for a few weddings, writing group, family history.
Have also done a lot of voluntary work for food projects and fundraising at committee level. When I was seriously ill, hence my early retirement my sister said if you had died and I almost did you have at least already fitted in a lifetime, I was late forties.
I know there are family, work and financial constraints but try as much as you can. There have been some non starters for me windsurfing, yachting, Zumba, ballroom dancing, ballet, ice skating and caving spring to mind but I tried them at least.