how did you learn to work on cars?

I got my start on small motors when I was about 10 years old. I had been eyeballing a old motor on a drag saw in my grandfather's garage. My grandfather was my inspiration. I had no father but my grandfather was a incredible man. So one summer day when school was out I asked him about the saw motor for a go-cart. He chuckled and said you can have it if you can get it running. Long story short, two days later It was running. It went from there to mini bikes/motorcycles to all my cars. One more thing, he was a avid mopar man.