Raising bilingual baby?

Hallie
Has anyone raised or have ideas about raising a bilingual child? My SO's family is Bosnian, and I want to keep their culture alive. I also hear it good for their neural development. 
However, I don't want to confuse her. Do they inherently know which is which? Can anyone recommend any methods, books, or other material? 
Thank you! (Hvalah) 😬