Culture shock is just growth with jet lag.

Disorientation in a new place is your assumptions being contradicted faster than you can update them. Everything you took as obvious turns out to be one option among several, which is genuinely tiring even when nothing bad happens. That exhaustion is the sensation of learning at speed. It passes as the new information settles into place.

Expect the first two weeks anywhere unfamiliar to cost more energy than you planned for. Sleep more than usual and lower what you demand of yourself. Write down the things that confuse you, since those notes will be interesting once you stop being confused.