That is how I found I best learned the craft many years ago. Now when I teach navigation, if I am with a group, after explaining and demonstrating a few of the basics I simply silently follow the group along on a difficult bushwhack to some obscure destination, letting them lead themselves (NO GPS allowed). Quite often we will get "lost". Eventually we will come out to someplace recognizable to at least one of them (or I have no problem spending the night in oblivion). Afterward we will go over in great detail where we were, and the many clues and techniques that were available to fix their position every step of the way. Otherwise, I advise self-learning by seeking to attempt to get "lost" in a "safe" area, say a terrain varied park surrounded by not very distant roads. Fast and effective learning, but it must be followed by detailed analysis.