If you post REGULARY on for example YouTube you will sooner or later get some specter of audience and later get noticed by some kind of producer, label (smaller or bigger) hopefully nice one (someone who knows his work well).
I think that the key to success is to keep doing what you like CONTINUOUSLY. Let people get in your workflow and that will bring expectations for MORE. If you just do something every now and then than you don’t act professionally so people won’t take you serious.
I just know it by a chance, because a girl from my school succeeded that way as a singer. Now she has quite a little fun with her new producer from Germany. She also brought my schoolmate (he is director) into the busines (he is making music videos for her).
Than you will be able to reach iTunes and other sites where you will eventually sell something (or gig somewhere).
Also check her out (this girl) on YT: julia aljaz
Hope U succeed š