Most of a release is the same on every store. These are the parts that only Spotify cares about, and the order they have to happen in for the pitch to count.
Before the upload
4 steps
The pitch
4 steps
Release day and the week after
5 steps
Two things people skip
The 21-day rule is the one that bites: upload late and the song still comes out, it just cannot be pitched, and the algorithmic playlists that follow a pitch never see it. And the credits: a producer credit missing on release day is hard to add later and is what the license requires, so check it before you post the link.