How to Introduce a Puppy

I'm covering dog dog interactions. So I'm talking about how to introduce like what skills your current dog should have before the puppy, kind of how to introduce them. And then later on like how are they going to meet stranger dogs? How are you going to structure that? Like puppy play a little bit about healthy play. And then further down the line like how to keep them friends and how to kind of have some harmony in your household.