Or alternatively you live alone and wake up not knowing where you are, who you are or why you are there. The first place you go since you no memory of any person place of thing?
If we couldn’t understand each other, I’d use hand gestures to try to establish a very basic form of communication. I’d also check out the surroundings (carefully); visually at first, then slowly by locomotion.
If one woke up with NO memories whatsoever (which is not very likely due to the way the brain stores information), they would wonder aimlessly around until they either injured or killed themselves.