Self taught ... been climbing trees since I was 5, so I was already highly experienced before progressing to using ropes and climbing hardware at 55. Gravity never goes away and we spend our entire lives dealing with and battling it.
Self taught here too. It's a steep learning curve.... but lots of books and vides help a LOT. I actually never watched anyone climb a tree when I started. Just videos. Not sayin it's the right way to do it, but I'm still kickin.