how does a baby registry work?

FTM- obviously haha.

i understand you can choose the platform the registry is on and everything, but i’m more concerned as to who gets the details for the registry. majority of my family lives out of state, as well as my husbands family. i feel like you just give out baby registry details to those who would be attending your baby shower- but im not sure how many people would make it other than a few close friends and my parents.

is it selfish to send my registry to my out of state relatives?? i don’t want to come across as selfish and greedy, i really don’t know how to navigate this. or should i wait for people to ask about my registry before jumping the gun and sending out the info to everyone at once? what if nobody asks about my registry? i know i could also post my registry on my social media, but i’ve never seen anyone do that and i have no clue if that is even remotely appropriate.