If you want any amount of discoverability, you will have to go to Youtube or Twich since those really are the only platforms that have any amount of viewers. And even then, discoverability is pretty terrible, good luck promoting a new channel from scratch.

If you just want to stream for the sake of streaming and don't mind having zero viewers, you can try PeerTube or Owncast. But do be aware that you will have zero viewers.