What's a fun way to learn about vegetation?

Hi Geoguessrs

I am a Master 2 player and I am fairly good in car metas / bollards / poles and stuff like that.

But I am really, really bad when it comes to vegetation, in other words, distinguishing countries or continents on the basis of trees and plants. What is a fun way to learn about that stuff? Is there a side with a quiz or something like that?