You should also read your instruction manual and memorize some of the key bindings. I'd strongly recommend that you read them, especially if you have some problems understanding what's going on. Most of these hints will allow you to find out more about some of the basic actions - crouching, jumping over obstacles or talking to other characters. You will also be given other hints during the course of the game. You will be told how to do different kinds of things, including using your map, checking out statistics or reading encyclopedia.
This is by far one of the most important tools of the game and you'll be using it all the time. The tutorial section will allow you to learn more about your PDA. Before we'll proceed with the main part of the game, you will have an opportunity to learn a few basic things about some of the important aspects of the gameplay.
