Pathfinder - Wrath of the Righteous; A Kingmaker follow-up that supports turn-based gameplay now!

How is anyone supposed to figure out all these details? I am just leveling up characters in one class, but I see tuns of stuff about getting 3 levels in one class and then 1 in another, and 5 of this other thing…

Am I supposed to get the official pathfinder handbook and then spend days or weeks reading it over? Like you are taking the monk level to get crane stance. I just googled that and it seems like a tiny thing to bother with. Maybe there is something I do not understand like I did with how power attack actually worked. I am assuming Seelah is your main tank. What is her AC?