STEP ONE
open Spotify and go to settings

Click on apps and devices

Turn on local audio files

Download whatever song you want! (In my case im downloading some MSI songs so jimmy doesn’t profit)

Move the file into your Spotify folder, which was automatically created when you turned on local files. If you don’t have a Spotify folder, check that you turned on local files again.

Go to local files in your library

Boom! Now you can put that song on any playlist, listen to it without worry of supporting the artist, etc etc! If it doesn’t appear in your local files playlist, close Spotify and reopen! Other than that, you’re done!