What do you wish you knew before you started engagement ring shopping?

I’m realizing there’s way more to engagement ring shopping than I expected 😅 For anyone who’s already been through it, what do you wish you had known before you started? Anything you would do differently when it comes to the stone, setting, comfort, budget, custom vs ready-made, or picking a jeweler? I’d love to hear what actually mattered once you started wearing the ring.