NCAA rules are organized in chapters called "Rules." Obviously, each chapter contains many, many actual rules for playing and administering the game. Quite deliberately, the most basic things are set out in Rule 1 - The Game, Field, Players and Equipment, and Rule 2 - Definitions. As TexDoc alludes, start there. Then, I suggest moving to Rule 7, then Rule 6, then Rule 3, then Rule 9, then Rule 10, then Rule 8, then Rule 4 and, finally, Rule 5. Forget about rule 12 for a very long time.
Robert