Especially when it builds you up over multiple posts that make it sound more and more like your exact problem.

Look into volumio to make a whole home music streaming solution. You can buy various pi Hats to get better DACs than the internal pi one.

This is a great question that is relevant for me this week. Been trying to set up a wireguard vpn and found I need a DDNS. Lots of good answers to look into in the comments. Thanks everyone.