Bored RoomSet up Bored Room
Pick the guide that matches how you manage iPads. Each one starts with a "Before you start" section and a checklist (accounts, access, downloads), then the hands-on part. They print cleanly, so you can hand the prerequisites to the Google admin and the rest to whoever's holding the iPad.
By hand
One to five rooms. You'll click through Google's admin pages once, then set up each iPad in about two minutes. Every step spelled out.
With Apple Configurator
Supervise the iPads from a Mac, install the app through Apple Business Manager, and lock each one to the board so it survives reboots.
Through your MDM
Push the app, the kiosk lock, and every setting including the room and the credential. iPads go from the box to the board untouched.
All three use the same Google setup. A free service account that your admin shares each room with. It's covered in full in the by-hand guide and summarized in the other two. If you'd rather do it on a call, book a free setup session.