it would teach you how to survive, and how to use the game. perhaps your character opens their eyes in front of the tv screen or is sitting at a table, listening to music, when an emergency broadcast emits and gives a warning of a highly infectious disease which and such, your character gets up, controls pop onto the screen and you have to walk to the door, (btw there are sirens and occasional gunshots happening at this point, sirens are happening from the beginning). The game tells you how to open the door, and you head out of wherever you are at (if your in a apartment building maybe the game would teach you to sneak by zombies eating people in rooms with the doors open) on the ground outside the building there is a gun beside a fallen police officer, which your instructed to pick up. you head down an alleyway to avoid the streets, and maybe while walking down there, you see a horde of zombies pass up ahead, which then the game wont allow you to go that way, and instructs you to go another way. after a short while of wandering the game will give you and introduction to the combat system and such. then, you have to get into a vehicle where it teaches you how to drive, and turn on the lights and all the stuff related to vehicles. then you have to drive through the city to get to a train station, like NuclearPotato said, and as he said,
and possibly after doing thew tutorial your character will start singleplayer with the items you gathered. which should only be a gun with next to know bullets, and maybe a melee.
Ima copy this to make a post about it.