Best advice I can give you, and I'm sure a lot of brothers will piggy-back, when you go - go with an open mind. Keep your ears open and pay attention and learn what you can. Everything that you will go through will not make much, if any sense to you at first. Keep in mind though, that you will be seeing this again and learning about everything at a later time.
I highly recommend not researching about the initiation, that takes away from the entire experience and you will be selling yourself short - especially looking up prior information about the ritual.
You will hear this time and time again "As many of brothers and fellows have done before." Good luck, and have a great time!