Apple recommends that you set up content caching on a Mac that has a wired Ethernet connection. You can do it over Wi-Fi, but performance may be affected.
software update
macOS: How to Update Your Mac in the Terminal
When you use the Terminal method, you can keep using your Mac as the update downloads and the initial installation will take place in the background.
AirPlay 2 goes MIA, How to Improve macOS Update Notifications - TMO Daily Observations 2018-02-21
Kelly Guimont and John Martellaro join Jeff Gamet to discuss what may happen next now that AirPlay 2 has been pulled from iOS 11.3 developer beta 3, plus they have some ideas on how to improve Apple’s software update notifications in macOS.
iPhone Home App Manages HomePod Software Updates
HomePod software updates will be managed in the Home app on your iPhone, much like the Watch app manages Apple Watch updates.