Here’s a list of a few coops: https://canadianworker.coop/join/members/

The list includes federations of other workers coops, like the Federation of EMT coops: https://fcpq.coop/

Plenty of artists still do sell CDs though. I often buy them at the merch stand at shows. Many also sell DRM free digital files on sites like Bandcamp. I also buy a lot of music at the thrift stores and rip them. If all else fails, there’s always the high seas.

Another vote for a music server. Gonic/Navidrome is pretty low power and super useful!

Home assistant is another option, but I’ll say that if you’re serious about home automation you’ll quickly outgrow a Pi. It’ll run if you only have a handful of devices though.