Zurine
Obscurus
I'll use martial arts as an example. .
I was talking about the paranormal, heh. When it comes to training like martial arts, then yeah. Learning structurally would be the sensible thing to do. Even when it comes to paranormal pursuits I think you have to have a foundation to start from. I know all of us have read a cookie cutter circle casting/calling quarters procedure and have built upon it for our own rituals/whatever.
Sometimes it's best to study a specific system of thought just to get a feel for things before going off on your own. I think it should be said that you shouldn't just follow any old kook on the Internet though.