I didn't learn to ride a bike until I was 39. Motivation was that I had just taught my oldest daughter to ride and I wanted to be able to go out with her. Also proving that yes, it is possible to teach people things you have never done yourself.

I picked up a cheap hybrid bike (about $250) from Dicks Sporting Goods and just started putzing around the backyard until I felt confident enough to go out on asphalt. Took a week or two, then I was out cruising the neighborhood.

I don't consider myself good at all, but now I know how to do it.