Very straightforward. When you load up the game for the first time, you will get a prompt on screen asking if you would like to play the survivor tutorial.
Choose yes and follow the instructions to learn the basic mechanics of playing as a survivor. Only takes 5 minutes to complete.
Straight after you will receive another prompt asking if you want to play the mastermind tutorial which also only takes about 5 minutes to complete.
You can also choose to play any of the tutorials from the main menu if you happened to skip the above.