We have published a GAM & GAMADV-XTD3 course on Udemy.
This course is a beginner / intermediate course of getting you up to speed with Google Workspace scripting and bulk operations. Once you have an understanding on how GAMADV-XTD3 works, you can create your own scripts and adapt it for your own environment.
We have also updated our Google Workspace Admin course with all the latest features.
And finally, we have updated our Google Workspace End-user course with advanced features like Google Apps Script for various apps like Sheets, Docs and Calendar.