About Being a Dataview Expert
I'm never going to look you in the eyes and profess to you how I am an advanced Dataview expert and how randomly while driving to the grocery store that I think in Dataview queries.
I will, however give you these two golden nuggets of information that have helped me get to where I am with Dataview and it's understanding.
Nicole's Dataview video from what can now be considered back in the day and the "Obsidian Example Vault for Dataview Queries".