The hardest part to do w/o books is building a character. I can assist with that and as mentioned everything is available on the Archives of Nethys:
https://2e.aonprd.com/
The core rules are pretty similar. You've got your attributes, your d20 to-hit roll, your 3 saving throws.
The big difference is the 3-action economy. They scrapped all the different action types (move vs. standard vs. full) and instead you get 3 actions a turn. Want to move three times? Done. Want to attack three times? Done. Want to move-attack-move? Done. Some abilities that used to be akin to full-round actions, namely casting spells or power attacking, just take 2 actions to perform.
It simplifies combat and provides so much more flexibility because attacking takes standard multi-attack penalties: -5 on second and -10 for additional beyond that so while you typically want to get an attack off it doesn't always help to just stand and attack so there is a lot more secondary actions done in combat and a lot more decision to make.
Another big deal is how character builds work. They split feats up into a ton of categories:
Ancestor Feats (these are like your racial abilities)
Class Feats (these are the abilities that you "unlock" as you level up)
Skill Feats (do cool things with skills like hide better or pick locks quicker)
General Feats (misc. stuff).
So every level you're selecting from one of those categories. Every level means you get to make at least one real choice on the direction of your character.
The way multiclassing works is that when you get a class feat instead of taking the feats available to your current level you take a "dedication" feat that lets you yoink the abilities of another class. A rogue's trap disarming or a barbarian's rage or a wizard's cantrips etc. can be chosen to create a hybrid character.
I like it because while it grants you the abilities of other classes it doesn't bork your main class. If you're a fighter that wants to dip rogue you don't lose your BAB progression. If you're a wizard that wants to dip monk you don't lose your casting progression. You just don't gain the metamagic abilities like you would if you focused on your class.
All in all I really like it. The 3-action makes enemies a lot more interesting to run as well from my end and the math is so much cleaner than in Pathfinder or 3.X.
@Phelar: Pick Ancient Elf -> Cleric Dedication as a Wizard. That gives you access to Cleric cantrips. As an alternative if you go something like Battle Medic you can use Medicine to heal in battle.
Cleric Dedication
Field Medic background gives you
Battle Medicine letting you heal 2d8 1 per person per battle.