Hi Wendy and welcome!
You're never too old to do what you enjoy.
I'm 50 and overweight and still like to skateboard with the kids in the park (only one broken arm so far) so who's to say how old is too old?
Your wife accepts you dressing the way you feel comfortable, so make the most of it for as long as can.
When you are a sophisticated lady computer whizz in your nineties, you'll look back and wonder what all the worrying was about.....and if you see a dubious looking old woman
on a skateboard go past your window, you'll know who it is

Bobbie XXX