New official looking for best reference for beginners

[ULSaint]

Hi all. I'm new to basketball officiating and will just be doing some youth ball for now, but I was hoping someone could refer me to a guide for beginners. Mostly I'm concerned with positioning more than rules. I know the rules fairly well but it's the intricacies of officiating that will be knew to me.

Having played all my life, it's funny I never noticed where the officials stood before and things like that.

Any help is appreciated.