I found the best learning came from doing, if you at least get up and try to find a way through you will be that much more experienced.
This removes the anxiety (but not the respect) and you will be much more confident crying "uncle" on the rare occasions where it really can't be done.
Sooner or later you are going to get "caught" in something, it will be easier to deal with if you have seen it before.
I have to honestly say I have never seen an ADF point towards a cell, neither has anyone else I know, is this something only really old gear did?