I’m 72 , my bike riding started when I was probably around 12 and I dragged home an old three speed “English” bike someone had thrown out in the trash.
I managed to get it to work as a single speed . I never owned a new bike until I was in my early thirties and bought a cheap department store bike , to ride with my daughter , but it didn’t last long and my interest changed.
In my mid fifties I bought an old Schwinn Heavy Duty at a yard sale and my love of riding regularly grew along with my love of single speeds .
I’ve gone back forth between single and geared bikes with my interest in single speeds taking over .
I just recently converted my Schwinn CrossCut and CrossCross , along with a Trek MultiTrack.
And my Specilized Hardrock .
Never tried FG but thought about it . I have a frame or two laying around and a couple of flip flop hubs , so who knows .
Is 72 too late to start FG ?