What does "of" mean here? Is it common to use "[subject] + [be verb] + of + ~"?
Answer from a Native speaker
The preposition of "of" is used to express a relationship between two things. In this case, "you're of two different worlds" can be understood as meaning "you're from two different worlds," with the "of" signifying the relationship between two people who come from different worlds. You can read it as "to be of different worlds," or you choose to use "from" instead of "of" here, but this is a common grammar pattern. Ex: They are of different educational backgrounds. Ex: They are of Japanese heritage.