The Pathfinder Resource Document is like all the rulebooks for Pathfinder in an easy to read/navigate page. Though we’re only concerned about things under the “Core Rulebook” heading, feel free to browse around!
PathfinderWiki is a encyclopedia of Pathfinder’s Golarion setting, in which our lovely country of Varisia is a part of. And yes, so is Andoran. Any questions you have about fluff (ex. Where would my character come from? What would he be like if he’s from there?) can probably be answered there.