well, yes, that's what I said - find someone you trust who has more experience. but you described a scenario where two beginners just teach themselves trial-and-error
I was responding to your comment about the 6-day AAI classes being insufficient. Optimally you'd get some instruction from a real person whether in a short class or not. But its not like you couldn't figure out how to girth hitch a tree to go toproping without taking a Mounties class.
What I had said was, that if you do that, one should do what they can to teach themselves and practice by placing pro and building anchors in a crack they can reach standing on the ground.
Like Rudy, I never got any formal instruction. I followed my Dad on some climbs as a youth and learned the very basics and saw what good gear and a good anchor looked like, but I never did much actual gear placement. In high school and after I had one good buddy who had about the same experience as I did, and it was just read FOTH and go out and practice ourselves.
Eventually, I was fortunate enough to climb with some folks who were a lot more experienced than me and refined my skills, but that was after I taught myself how to place gear and build anchors.