you can normal upload it or put it in a zip file. The zip file is the better way so people wont have to click on so many buttons and you wont have to constantly upload 1 music file at a time. If you have soundcloud, spotify, apple music, etc you can show a embed song list like this person did: https://bit-by-bit-sound.itch.io/8-bit-music-booster-pack
you can also promote yourself and get follows, set the price and commission fee to your liking and set rules on how people use your music.