how did you learn to work on cars?

My dad and 3 of my cousins showed me. But before that, I started on Briggs and Strattons'. Had a go-kart and a mini-bike that I got all on my own doing when I was in the 12-15yo range and would tear those apart and put em back together....even if it was just to clean up parts or see how the rings and pistons were doing.
And, as I mentioned in another thread, one of my 3 aforementioned cousins who took me to the drag races for the first time. Two of them are brothers and shared and dragged a 69 Roadrunner. The other cousin drag raced a 70 Duster. So, I was surrounded in it, lol.