Love reading these kind of things about my home country!
I moved the other way around, from Holland to the Caribbean, so getting used to cultural differences is not always easy I know.
What I know now after not being there anymore, is that most Dutchies are not so much of inviting people in that they dont know. Here on Sint Martin if you invite someone, you invite the one that is standing next to them as well. For sure this is the same in Brazil. But in Holland you invite someone, even though someone is standing next to them, and just ignore that person.
Integration isnt easy, but at least you have a man on your side helping you out.
Dutch language is a bitch... No other words for that.. Only exceptions on every rule hahahha