This sounds like a great idea. I would suggest doing also other things that simulate the brain in other ways, like listening to music (or even playing an instrument), visual stimuli (art, nature), physical motion and coordination activities (dance, sports). You may well already do these things, I just felt I should mention it since our culture is so prone to associating brain with mental logic specifically and forgeting how much these other things involve the brain.

Learning a language is another thing with really strong evidence for brain development /preservation.

I have no idea about Navidrome, but I completely agree with the gist of this article. Actively choose the music you listen to. When the music you’ve chosen has run out, if you’re not motivated to make another choice, let the music stop and enjoy quiet for a while.