I did it! I finally rode a bicycle for the first time in my life yesterday!
For me, the expression, “It’s like learning to ride a bike,” will now always mean, “It’s like learning to do something that everyone else learned at age 5 from their parents, but you learned at age 30 from an elderly volunteer, in a free class, with a bunch of Chinese people.”
I think it’s still a useful metaphor for life.