Koreans are mindful of formality and seniority in influence of Confucianism, which was highly appreciated in early ages.(in Joseon Dynasty) But it's totally fine for you to make some mistakes because you're a foreigner and not good at korean. I can see you are a lot concerned about making mistakes and all the koreans will, too, and they will understand your mistakes. though it would be nice if you can prepare some about korean 예절(decorum, etiquette). if you want to learn some, I recommend to search "etiquette in korea" in youtube. Hope it helps! and if you don't understand or feel curious about something, feel free to ask :D

Question is a lot of difficult T T Because of life has so many situations But i know ,i know and almost korean people know Singapore people is very high level people And Zorobin have very good ''Memory Ability" Because of~ Zorobin knows mistake_- And i think Zorobin is very high level people_~