Sonos speakers are super easy to set up. But you still have to figure out where to put them. Here are some best practices.
Number and Placement of Ceiling Speakers
Ultimate Rear Speakers: Era 300 and Sonos Home Theater
Installing and review of the Sonos Wall Mount with the Sonos One SL
ERA100 Wall Mount Bracket, Low Profile, Black, Single Unit, Compatible with Sonos ERA 100 Speaker, Complete with All Fixing Hardware : Electronics
SONOS User Guide
How ERA 300 positioning fits into the Dolby speaker 7.1 layout : r/sonos
Help to placement of 2 sonos one
SYMFONISK Sonos WiFi bookshelf speaker, white smart/gen 2 - IKEA
How to connect Sonos speakers to your TV