There's also a generational layer to this โ the handshake and eye-contact norms I got comfortable with among people my age turned out to be completely wrong with elders. Different rules depending on who you're actually talking to, which took me a while to notice.
Six weeks in and I greeted my neighbour with a cheerful wave instead of the proper hello, and got the coldest look of my life. Turns out there's a whole ritual I didn't know existed. What's the small etiquette thing you got wrong before someone finally explained it โ the mistake you can only really learn by making?