Funny, most in the U.S. start riding very young but my GF was born in Sicily and back then there was no opportunity to learn because access to a bike was zero. Her little town was still using beasts of burden for transportation and she never learned to ride, and now in our late 60's I think it imprudent for her to start now.
Anyway, I remember like it was yesterday when I learned, maybe 1956? and on and off I've ridden as a lifelong diversion from daily issues. It's my "zen" thing where I can zone out focusing on the ride, or slow it down and reflect on recent and past issues in my life.