At my first trip to USA I had no relatives there. Got them later as in-laws.
Going from USA to Italy some decades ago probably was more of a "cultural chock" than for me to go from Sweden to USA.
Sweden had a very high standard of living just like USA. Living in a small town in Sweden and go to New York was of course a thrilling difference.It got to be a fantastic experience of small details and fun memories from an international citiy.
As a Swede I find it is easy to be around Americans and also British people.
It is easy to make small talk with them.
The British sence of humour is wonderful. The Danes and the British are so alike in that sence.
If you start noticing people you can - to a certain extent - tell from how they move their hands, hold their heads during a talk where they come from. That is from a distance.
In Germany I somehow noticed that men with a deep and heartly laughter often were Catholics or Lutherans, but the evangelische /reformed) had a rather timid laughter.
Swedes -also are more timid when laughing - even tho they are Lutherans.
Danes laugh a lot.
Interesting is to notice oneself being in other countries when one can speak the language. You are basicly yourself, but somehow you change your personality a bit.
Being with Germans I would never start playing with words as they do not understand it anyway.
Living or visiting another country one expects differences. For me it is the small details which never stop suprising me.
I learned when teaching individuals going to Scandinavia to work it is also important to teach a bit about "how to behave". Of course people do behave,.
Scandinavians when asked "How are you" would say "Fine, thank you" whereas in Germany you tell them about your cold, and stomachproblems and other things you do not want to hear.