Ohh @suzukitamami welcome to steemit. I fear, it's not a site for direct sale of music but You can pretty much do a lot here like get some following, promote your music, make your presence known by participating in music contests and if possible meet someone interested in your song. You never can tell.

Ps- I'm a big music lover myself, I'd love to listen to your work sometime

Reach out to me if you need any sort of guidance on your steemit journey :)