I have 49 gb of music and at the moment i just sync it between my devices with syncthing. But i think it will be better if i stream it, as the storage on my phone is limited.
Which streaming server do you recommend?
I saw nextcloud music, but i have the feeling it’s half backed and it will just clog my nextcloud install. Or supysonic? Ampache?
Well, you can just use IP whitelist on Funkwhale, so that only your IP can access it. And besides that, there are some privacy settings IIRC, that only allows logged in users to view the library. So if you disable registration, nobody except you can view the library.