Create a Spotify account
Open Spotify and sign in
Search for the song in Spotify
If the song is available, tap or click it to play
If you want to save it, tap or click the heart or Save button
Add the song to a playlist if desired
If the song is not on Spotify, upload it through a distributor or release service
Distribute the song to Spotify through an approved music distributor
Wait for Spotify to process and publish the release
Search for the song again once it is live