people will still be like ‘wtf’ haha
People here (North Holland) are used to tourists and immigrants. A local could use “Hi”, “Hallo”, “Bonjour” or “Shalom” instead of Dutch-specific “Goeiemorgen”/other. If I say “Moin” or “Ciao” or “Hola”, people will understand and sometimes reply appropriately, but likely continue in English not Dutch. It’s something anyone would do for fun.
“hyvää huomenta” and “terve” on the other hand are not widely known to be a greeting. “tesekkuler” will not work as “merci”. I don’t do that.
This depends on your location. In many countries the ducks at the park are way more expensive than the ones you can get at the grocery.