Spotify and Pandora are the best places to find interesting, no -commercial music.
YouTube is also interesting. I often hear something interesting on Pandora and then look it up on YouTube and explore the music which gets associated with it in the sidebar. I find stuff that I never would find any other way. Then I adjust my Pandora station and the cycle continues.
Don’t Forget Amazon Prime Music.
Chances are you already subscribe to Prime. If so, hundreds of thousands of songs and artists are free.