What should I read to know where everything is for this rally?

To learn explicitly about this rally, there are two things you should look for:

1. Supplemental Regulations (aka 'Supp Regs' or 'Supps') - These will be posted in the competitor section of the event web site, and lots of it you can safely ignore. But you should find this and print out your own copy, for it contains such useful things as the schedule of the whole rally, plus the addresses to places like registration, tech, and the service areas.
2. Rally Guide - Well documented modern rallies will also publish a Rally Guide. This is also found in the competitor section of the event. This has much more information about the event, like maps of the stages, directions to the stages, maps of the service areas, and spectating information.

Again, you'll want to print your own. Your driver will forget to print you an extra one, and only one is delivered at registration, which the navigator will probably stash in their bag, 'just in case'. :)

You'll also want to check the official notice board at registration for any bulletins. There's no telling what you'll find there.