We're having a VR in Dec and started by looking at Disney weddings official site and starting a wishbook. Here is a great place for more detailed info on just about anything you can think of related to Disney weddings/VR (Disney treats a VR exactly the same as a wedding - the price, services etc).
I would suggest yu check out their site, start a wishbook and compile a list of questions, then come back here and either search for previous questions that have been answered or post a new question.
Have fun, and don't be afraid to ask!