In addition to reading, find out if any of your local clubs have clinics. This is one of the best ways to learn the ropes, IMO.
My local club has new shooter clinics every year (usually scheduled for the first cool and rainy Saturday we can find!
), where we teach the fundamentals of the rifles, the shooting positions and how a match is run. Normally we have some kind of match on Sunday after; I think we have also run a "mini-match" the afternoon of the clinic as well.
The Zediker book is also worth it for its content, as is the USAMU guide. And finding a coach or fellow shooter who can show you the pointers is also helpful. Find somebody who is Master or High Master classified and you'll be able to learn alot.
And remember to have fun!