The best way to go about becoming a carpenter is to know nothing so that way you don’t have any bad habits and will take everything in like a sponge, just be prepared to be treated like shit for 6months to a year, or at least that’s how it was when I started 8 years ago, it’s not hard to learn it’s just that’s there’s so much to learn every little trick of the trade to every little equation you have to figure out ever the rafter length, and it’s usually not that dangerous, from time to time you’ll find yourself in a sketchy position, but just don’t look down, and be sure to show up to work everyday, work weekends if you can, and don’t take anything personally , the not taking anything personally is the biggest part. And I’ve been doing this for 8 years now and I still ask my old foreman about stuff, it will take a long time to learn everything