jklein..those other guys are right on the money,find a good pro shop, one you feel comfortably with and go from there. Like the other guys said don't worry about speed right now.
Trust me that will all come later as you become more addicted to this madness.
I would stay with alum. arrows just my preference, and stay away from real radical cams for a beginer. Welcome to this twisted state of mind we lovingly call bowhunting.