The Minimalist's Homecoming

In an apartment, a young man lies on the floor, seemingly having fallen after hitting his head hard while reaching for a book on the shelf. "Where am I? Who am I?" he wonders, finding himself devoid of memory. He attempts to access his personal information but fails to retrieve his PIN number from his phone or PC. Despite considering himself a minimalist, he struggles to locate anything in his room. What should he do?