I started shooting a bow at the age of 10 and by the time I was 12-13 I had figured out how to install sights and rests and basic bolt on accessories. When I started working at the archery shop when I was 16, it probably took me a couple weeks of getting shown what to do and different techniques. After the initial learning phase, and I started working on customers bows constantly, I became pretty proficient and quick after about a week. I worked in the shop for about 2 years and am able to do almost any task possible with a bow. From basic initial setup (rest, sight, peep, nockpoint, silencers, d-loop, sts, papertune, walkback tune, etc) to setting to specs and cam timing, replacement of cams, limbs, to complete tear down to parts and reassemble. It really isn't all that difficult to do, just takes being shown the right ways and getting comfortable doing it.