Shortcuts: I suggest that you look at the Quick Reference Card. Some shortcuts come really handy, in particular if you do not wish to turn on the "View Element Boundaries View". If you know well your structure, you can gues where you are just by looking the elements menu (which should be always open). Here are 2 the most useful ones (learn some more):
Note: Under Unix a lot of people use the small subset of Emacs with standard FrameMaker. You will not find these for structure editing, e.g. No M-C-f :(