I Taught in an art school for years. I've just joined this site and am learning new things just as I do whenever I'm looking at serious, sincere efforts. When I was learning, the quick pose/sketch methods were the best help to me, by far, and I used them in my teaching.
Students who really wanted to learn, had drive, didn't really need me except for encouragement and a few basics, both of which you can get on this site if you take it seriously. Students who didn't care, or were there only because their parents sent them, or they thought they were supposed to take some kind of classes somewhere, barely got by if at all. Students who wanted some mystic glamour cared little for the skills, tended to copy trends, and rarely got life and feeling into their work.
Some formal art schools will get you too scared to break out with your own way. On the other hand, without critiques, you may never learn to pass on the wonder to others.
Regarding nudes: to me, living things, particularly the human body and soul, are the basis of our innate sense of proportion in everything - music, literature, architecture, and drawing.
