You awaken with only a bare minimum of clothes on you, some canned food, glass of water and only your bare knuckles to defend yourself - time to get creative by scavenging for rocks, wood, plant fiber and bones, to make primitive tools (stone axe, stone shovel, shiv), basic weapons (wooden club, bow and arrows) and simple clothing made from plants and a sleeping bag. Venture the lands to find weapons, building resources and cooking tools, hunt and gather for food, process down hide into leather and start making a forge and start crafting metal objects.
How this will play out in the long run is up to you - survive and even thrive, or perish at the infested claws and teeth of the undead, but also harsh environment can be your demise.
Beware of the 7th night though, with the blood moon shining the undead will rise in masses and will be stronger, faster and more aggressive. Make haste, prepare for this event so you can survive, rebuild, expand and survive another week!