So, Pathfinder Second Edition has quite a lot of choices when it comes to character building. And this stuff is definitely going to be overwhelming for new players. If you simply give them a giant list of something like the backgrounds or the ancestries, or even the classes, they're immediately going to be somewhat concerned. Some players, funnily enough, will actually love all those choices, but I imagine most are going to be distraught.     Ultimately, it's one of those things that as you get experience with the system, you start to realize that the choices aren't as crazy and massive as you think they are. Experienced players will know which are the most efficient spells, the most efficient general feats, the most efficient ancestry feats for their particular ancestry, etc. But of course, new players are not gonna know these things, and the system is going to seem quite daunting to a particular type of player initially.     But first things first, if you are a GameMaster and you are introducing a player to this system, realistically you have to be helping them make their first character. And I mean really you should be with them step by step. I think anything less than this is negligible GameMastering.     So with that in mind, I think the best way to get players to realise that these choices aren't as terrifying as they may seem is to simply go through a single list of level 1 feats with them. So pick something like ancestry feats or class feats and just go through them, one by one, and explain how they work.     What your player should hopefully realise, and if they don't realise you should tell them this is that not every single one of these feats is going to be useful for every single character. On top of that, if you emphasise how Paizo recommends people build characters within this system (which is by creating a character concept first), then they'll start to notice that most of these choices aren't going to help with their character concept whatsoever.     Obviously there's a million other things to go over when it actually comes to the rules, and that's definitely something you should be doing. Explaining the four degrees of success, explaining the whole +10/-10 thing, explaining how every plus one matters, etc, it's all very important, and they do need to know these things before they start their first session.     But once you've gone through a particular list of feat choices with them and they start to notice that most of these suits aren't going to be good for the sort of character concepts they have in mind, they can hopefully start to realise then that this system isn't that daunting. Because while there are a lot of choices, there's only really going to be two or 3 at any given level that's actually going to be interesting for their particular player character.     Because that's the sort of secret to understanding Pathfinder 2nd Edition; there is a lot of choices, but most of those choices are not going to suit every single character. The game is so well-balanced, unlike lots of similar systems, that there is no right choice to make at any point. The correct choice is the choice that suits your character concept the most!

And yes, you can make the argument that there's definitely some more powerful abilities than others, because of course there are, but ultimately this is a Tabletop Role Playing Game, emphasis on the role play part. And due to the generally fantastic balance found within the system, there aren't that many awesomely powerful abilities to choose at any given moment. And most of the time you're going to pick abilities and feats that suit your character concept.     And I think that is the easiest way to get players to understand the choices in this system are not as terrifying as they seem. Go through a single, small list of abilities and feet to make them understand that not every single feet choice is going to be worth it for every single character. And then when they next have to pick them themselves, sure, there's a list for them to look through, but it doesn't take all that long to go through (thanks to feat categorization and level-gating), and they'll soon realize that there's only really a couple of choices for them to make at any given time.     And of course, definitely mention retraining. Not every choice that you pick is permanent, and they will be able to change them at some point if they no longer like certain choices that they made.     Hopefully, that helps with getting new players to understand the choices in PF2e.