Thanks.
I can wrap my head around the Great Wheel cosmology, as conveniently printed in the D&D 5E PHB; and I can also wrap my head around the spin WOTC gave the cosmology back in 4E. I own the Manual of the Planes, for 3E and 4E.
I have several, to many thousands of pages of PF hardbacks; and I'm not seeing the quick, simple, easy presentation of the cosmology. Knowledge of it appears to be assumed? There are different planes named, and different celestials / outsiders around every corner.
For PF 1E to have been D&D 3.XX; it seemed to throw a lot at the wall in a hurry?
The first presentation of the PF1 cosmology is in a distinct cosmology chapter in the original PF1 'Inner Sea World Guide' the core setting book which gives a concise overview of the cosmology, and it was later expanded on with a book of its own 'The Great Beyond: A Guide to the Multiverse'.
PF2E includes a primer on the cosmology in the 2E Gamemastery Guide in a chapter of its own.
I wrote the above three FWIW.
I personally think that PF benefits from having had a cosmology in mind at the outset of the core setting and natives for those planes in mind, whereas D&D had a slow and not necessarily planned in advance development and population of its cosmology. But of course YMMV.
I don't own the Inner Sea World Guide, or The Great Beyond: a Guide to the Multiverse.
I do own the encyclopedic Core Rulebook, Strategy Guide, Gamemastery Guide, Advanced Player's Guide, Ultimate Magic, the NPC Codex, Monster Codex, and all 6 of the Bestiaries. Plus the Beginner's Box, the Dragons Unleashed Campaign Setting, and the Bestiary 1 Pawns. And in all of that, there isn't very much cosmology information. I've had to just treat it as equivalent to the 3E & 5E cosmology.
But then there are so many Celestials / outsiders, and planes, and some of the names are different..... It's overwhelming; because this isn't my only RPG, or even my only hobby.