I'm also interested in learning to make the most of Google Earth.
When my school started using Google Classroom in the fall of 2020, Google had some very good free training (set up so that access to everything was free, but if you wanted a certificate of completion of the training, that's when you had to pay; if you didn't care about papers to prove your knowledge, you never had to pay). I've been snooping around Google Earth trying to see if they have something similar, but with no luck.
How did you learn? By just playing around with it? I feel like I'm getting too old to learn new things that way and I'd like a bit of guidance.
Any youtube tutorials to recommend?
We are laying out water retention features and an irrigation system for our steeply sloping 29-hectare reforestation plot in southern Mexico, where rains come between June and October and hardly ever outside of that.