Austox, if you're new, you definitely want to check out the links that TequilaChaser posted.
Also, it's very helpful to go into the game, to the settings menu, and check out the keyboard mapping tool. You don't change anything, you just scroll through all the commands and see which keys are mapped to them. It really helps you get past the basic key commands (like engine start, wheel brakes, flaps, gear, and so on).