Depending on the music you are seeking really. DJ or electronic influenced SoundCloud and Mixcloud have free options. If Hype Machine is still active it aggregates new music blogs across all genres.

An article from a browser search may hold some other options you find suitable:

https://audiohype.io/resources/best-music-blogs/

No problem. Only Pixel devices currently have this option. No idea about custom ROMs but wish you well on your research

https://news.itsfoss.com/google-android-linux-terminal-rollout/

Within developer options natively now