Now I tried it too, and I am disappoint, son.
The game doesn't even tell me how I can eat the fucking apple in my inventory. And it doesn't tell me what those two round fields are representing, where I can equip stuff. If I didn't watch a youtube video I wouldn't even manage to barricade the windows. And I still didn't find out how to kill zombies with a hammer.
Really, either the tutorial needs a few more explanations, or they need to rework their entire inventory and menu system dramatically.