From the time I was 6 or 7 I cut wood with my dad who worked as an assembler in a high tech filtration plant, he also built biplanes in the garage in his spare time, by the time I was 12, I was bored with planes and discovered one of our neighbors was a retired mechanic and gunsmith with a shooting range in his backyard, by 15 I had a gun collection and could do simple mechanical repairs. I learned a lot but soon became interested in cars and girls. During college I worked at a salvage yard and after college I joined the corporate world but always felt "at home" with greasy cut hands in front of a toolbox, having grown up poor I always lived cheap and after my divorce And some health issues I decided to keep my sanity by spending more time working on saws and small engines and leave the corporate world, I guess you could say I learned some by trial and error but mostly from paying attention to the experts around me. I consider mechanical work therapy.