Sharing a video YouTube introduced me to:
Google Sheets - Full Course created by Barton Poulson from datalab.cc.
It is a basic course, but Professor Poulson is statistician and focuses largely on how to use Google Sheets to visualize data. He is an excellent teacher and focuses more on using Google Sheets, rather than how to use Google Sheets.
Even as an experienced user, I found lots to learn and new ways to approach problem solving. It is 3 hours long (although I watched on 1.5x )