how old where you when you first work on a car

My first experience with a car was when my 16 year old best friend and another neighbor were putting new plug wires on his 67 Dart. Of course they got them out of order. I went to a local service station and asked about a V8 firing order. The mechanic handed a big book to me so I could look it up. That when I memorized 1 8 4 3 6 5 7 2. I went back to my friends house, pulled all the plug wires off and started from scratch. I put them on and the car cranked and ran perfectly. They were amazed. I became the go to guy after that.