They just launched some new Pathfinder books that are effectively pathfinder 2.x, with a lot of small (and some larger) tweaks, but technically the previous 2e books are still able to be used interchangeably.

To that end, there's a Humble Bundle going on where you can pick up a TON of that legacy 2e content in official PDF form, so if you're interested you should check it out! I believe most tiers include the Beginner Box, which has an intro adventure for new players and includes some sort of single player content that would give you a glimpse into how the game runs :)

Yeah, it's definitely in the same wheelhouse as modern D&D, so if you like that general experience but want to try something new, it's worth checking out. It's my pick when I want high adventure, superheroic fantasy, with engaging set piece encounters, which is the vibe both games are going for.

@machinaeZERO@lemm.ee is also right on the money. There's going to be a revision coming up, but the old stuff is still compatible and in Humble Bundle right now. (Pathfinder does that periodically, and they're pretty sweet deals!) One more thing is that all the rules are free, legitimately. There's a wiki called The Archives of Nethys, which has ALL the rules content from ALL the books. Paizo allows it, and explicitly gave the site the green light to do that. The books are still nice to have, and you still need them if you want adventures or lore, but you never have to buy a book just to get some rules in it, like a class or feat or whatever.