Have a look at some of the information on the following websites. It wont give you answers to all your questions, but become familiar with the information, it will make everything a little easier once you get going.
Aviation Weather Services
Pilot's Web The Aviators' Journal - Principles of Flight
Flight instruments - Wikipedia, the free encyclopedia
Air navigation - Wikipedia, the free encyclopedia
These are probably a good start. You do get lots of good course information, just keep your reading up.
Another thing, much of the information must be learnt by rote.
Rote learning - Wikipedia, the free encyclopedia
Oh, and you might like to look at
Aeronautical Information Package (AIP) | Airservices this as well.
This gives a good explanation of rote learning. It is very important once you hit the academy.