Oh look, see you did find the info, none of which looks too out or the ordinary outside a couple things, and it took what 1 search. wasd also does work, I have been using it since 2005. I can also use the mouse to select things, if a bit wonky and directional keys have been common for moving through menus since computers were computers, so yes completely normal. Not being to do it in ffxiv is the actual weird part.
The fact that you didn't look this up before or at any started guides, esp for an old game, and instead "moving in circles trying to move, for absolutely hours" as you said, just proves that you were the guy putting a stick in his own spokes. But somehow its FFXI's fault.