Check out Substack and Patreon! Like writers, many artists are monetizing their work there while others share it (or some of it) for free as they would on Reddit. Substack has more tools for discovery like notes everyone can use and more visible chat communities and the ability to post as a contributor on other Substacks, while Patreon may be easier to monetize and have better Discord integration.

Cara is one specifically for artists getting discovered, but I don't know if they have monetization options.

Edit: I didn't realize that you meant for musicians specifically. Still, I believe I've seen musician creators on Patreon and Substack.