I learned on bicycles, friends' mini-bikes, mopeds, ATVs, scooters, and the occasional dirtbike. I then got my first streetbike and took the very basic DMV test to get a license when I got out of vocational school in the Marines. I rode many different streetbikes for several years, then hung it up for a decade. When I got an old streetbike again, my GF decided she wanted to ride too, so we enrolled her in a BRC and I decided to join her. I'm still learning things, several years later.
'8yrs in the Marines, 'almost a decade of knocking heads in the service industry, I took a ride out to visit family and friends for Thanksgiving at 41yrs old, and my mom confiscated my bike.