I have entertained people from different cultures, religions, and ethnic backgrounds (I occasionally meet and entertain people from different parts of the world in my line of work). I KNOW what you are feeling …..

Rule #1 Be yourself (It's was because that's what you do best)

Rule #2 ASK them Questions (you can't know everything about everything nor take "someone, somewhere told me" as fact. They will appreciate your concern & your sincerity to accommodate.

Rule #3 Be tolerant to their habits/beliefs/customs, because they are (to YOUR bumblings)even if you don't know it. You are different to them.