Yep, I, too, started riding young when I was a teenager in 1966. A little Honda 50 step through. No experience, lots of "learning opportunities." Fortunately, never a major accident. Finally got my endorsement riding a Honda Hawk in the early 70's well after I already had my driver's license. Graduated to bigger bikes, especially touring bikes, and have ridden in all of the 48 contiguous states. It's been quite a journey.
It's the college of hard knocks you refer to that I wish every new rider could avoid by taking a beginner's course prior to purchasing their first bike. When I became an MSF certifies instructor in the 80's, training programs were starting to take off. Hopefully, I was able to help my students avoid serious issues after course completion. One can only hope that's the case.
Jeff