wifi router help?

hey folks, im thinking about buying my own wifi router (currently have one via spectrum), i was browsing at tp link web site and there are numerous wifi routers. wifi 6 , 7 and each of them has a lot of different models, i used compare button but it didnt really tell me much (or at least in a way i could understand).

I have fiber 1gbps internet currently around 20-25 devices are connected including laptops, phones, extra large tvs, gaming consoles, smart home accessories.

my question is, when buying the new router what should i consider? or how do i know which one i need? some of the wifi router at tp link saying that has 19gbps , which is not widely available, or does that stands for something else?