1. Before getting started, make sure you have a Spotify account linked and API key set. If you don't, warnings will show telling you where you can do so.
2. Configure the overlay to your liking. Any changes will show in the preview on the right, but it won't show your own songs yet.
3. Click "Save settings" to save the changes you made, then click "Copy browser source URL".
4. Create a new Browser Source in OBS with the copied link as URL. Make sure that the resolution is 1000x200.
5. Start playing some music! Any future changes you make to the settings will automatically update the overlay after clicking save.