It’s using LE Audio, which is a new tech explicitly designed for this. Syncing audio should not be an issue, at least once it has some time to mature and client devices improve support https://www.bluetooth.com/blog/10-frequently-asked-questions-on-le-isochronous-channels/

It had long since hit critical mass in Europe before it was bait and switched to serve as a US fascist tool of propaganda. Banning it is the correct response.

Decent list and plan overall. Since you enjoy self hosting and seem systems oriented, I’d add Python on the curriculum somewhere. That would round things out nicely for you.