This page is for answering "How do I..." questions about BIM.
The best way is with an experienced user at your side. But, Graphisoft provides a variety of downloadable tutorials and movies. They are located in several different places on the Graphisoft web site:
Shortcuts are almost completely customizable. Whether you are using the defaults, or ones customized by you, a friend or your CAD Manager, you can readily view and print the current shortcuts via Options > Work Environment > Keyboard Shortcuts... At the bottom right of that panel you'll find a button labeled "Show Shortcut List in Browser". Click it, and the current list will appear in your default web browser for viewing or printing.
The bottom of the list will contain about two dozen shortcuts that are hard-coded and cannot be changed. For the others, you can not only alter them, you can assign more than one shortcut to the same command.