Welcome to the group. You will quickly find that you have decided to join a fraternity of sorts.
Well, you will learn a lot by reading forums like these. The best thing about these boards is that it encourages you to get into the rule and case books and really dig through what each rule is about. You will hear this many times, but focus on rule 2. This may seem boring and pointless, but once you understand the definitions, you will be able to read the rest of the book more clearly.
Also, I maintain a web site that has numerous resources from mechanics presentations to word documents. Check these out. Lots of knowledge there. You might also want to check out this board:
http://www.nfhs.org/cgi-bin/ultimate...?ubb=forum&f=9 as it deals mainly with Fed ball. Last, search these boards for "new official" or something like that. There have been many threads similar to this and we might overlook something.
Again, welcome to the group. You will find that once you start officiating, you never watch the game the same again.