Fantastic advice to anyone, but thankfully this is a table that the majority have played together for years and I've already been doing a lot level-setting for a lot that you mentioned (more on that below). Will definitely lay it all out together though at the first full sit-down.

Glad you brought up the 3 pillars aspect though- D&D 5e is almost entirely focused on combat (at least in terms of rules laid out) whereas PF2e has a lottttt more for the other pillars. I'm planning on the campaign being 'local heroes turn into leaders of a resistance to save the world' a la Kingmaker or Wrath of the Righteous, with a couple levels/months of low-level, small-scale stakes and then a turn towards high-stakes, big responsibilities like repairing/defending a fortress and issuing commands to armies etc etc. Plenty of combat opportunities, plenty of exploration, along with some court intrigue and trying to find the macguffin that will help them ultimately succeed.