What is the official chronological order to start watching Tales of Arcadia on Netflix?

https://en.wikipedia.org/wiki/Tales_of_Arcadia#Overview

Now, that gives you a sort of overview
but in fact (and sort of unfortunately)
3Below overlaps with the third season of Trollhunters.

This discusses the third season Trollhunters / 3Below chronology in detail, but (unfortunately) doesn't lay it out in a handy-dandy chart form.
https://www.syfy.com/syfywire/3below-trollhunters-connections-netflix-del-toro

just watch it in whatever order you want to watch it in