I second the Redding Guide. It is an invaluable tool. Try to take the book in chunks, read a small section at a time, fully digesting what the rules are saying. Rule 2 and 10 are your two most important rules. I would start with Rule 2 first to get a foundation for your definitions because they are used throughout the book. Rule 10 is penalty enforcement.
Definitely do not start at page 1 and just go. You will drive yourself crazy.