You will have to run a lot during the game, so in order not to train your fingers, use auto-run (Num Lock by default).
The character is always in the center of the screen. To zoom in or out, use the mouse wheel. USE WASD keys to move. In order to rotate the camera without walking back, hold down the LMB and turn the mouse in the direction you want to look in. You will have to run a lot during the game, so in order not to train your fingers, use auto-run (Num Lock by default).