I was on my Atari 800XL making games at that age. I started hitting problems that I thought should be easy. Like, I wanted to draw circles. But the library was just pixels and lines ( when I got to assembly programming, suddenly lines became a problem too ). There was no googling the answers, but luckily I could go "Daaaad..", who was a physicist, and he happily introduced me to trig and I eventually learned to draw circles....slow drawing circles, but still, circles.