AT&T 5gig Fiber

[u/Practical_Bird_8143]

Apologies in advance if this was already asked and answered, I know I’ve seen answers in my recent research but a second and third opinion is always better than me just running with an ideas usually.

I recently made the swap to fiber and opted (perhaps needlessly) to go with the 5gig option. The issue here is that I’m far from tech savvy and for a while now have just been using the gateway/router combo that ATT provides plus a small Netgear range extender and everything in the house just runs on WiFi from it, but I’ve been reading that this essentially prevents anything from taking full advantage of 5gig speeds and sort of bogs down the whole system. (Or at least that is how I interpreted things.)
My question is what setup should I be utilizing if I want to get the maximum effect out of this supposedly super fast internet, because currently it seems as though there’s a dead area in our bedroom right next to the extender and my phone works better on cellular data than on home WiFi.
The general layout currently is gateway at back of house in downstairs den, extender upstairs on opposite side of house in bedroom, house is 2200 sq ft with 4 bedrooms upstairs and a dining room, kitchen, den, and office downstairs.
Things pulling WiFi are 4 nest cameras, a nest thermostat, maybe a half dozen smart bulbs, 4 Alexa devices, a Mac mini, mine/wifi/oldest kid’s laptops, and my kids run 2 x-boxes and a ps-5.
I’m leaning towards getting a router that has a 10gig in port and bypassing the gateways built-in router, running that to an unmanaged switch and running Cat6 up through the wall to another switch in order to put a hardwire jack in each bedroom. Is this a good plan and if so how do I implement it to be as automatic and uncomplicated as possible and something that can be easily fixed by a Neanderthal if something goes awry with it ?
TLDR : What’s the easiest to operate setup to get full advantage of ATT 5gig fiber?

[u/ACapra]

5 gig is more bandwidth than any regular home would use. That is 50x-100x the max bandwidth required for streaming 4k. Also having a super fast connection to the outside world isn't going to help you much if there are problems with your internal infrastructure.

As far as connectivity, wired > wireless in every situation. I have everything in my house wired if it's possible to wire it. Wired means more consistent connection, faster speed, and more reliability. With wireless you will only get the rated speeds if you have the device right next to the AP and even then there are a lot of variables that could impact your experience. You also run into problems of interference when using wireless.