You basically have two issues. Lets tackle the simple one first.
Box from your internet provider -- WAN port on router
LAN port on router -- switch
Switch -- each drop in your panel that you want active
Boom. You now have wired ethernet and internet to each room you connected to the switch.
Now Wifi - typically the more complex one.
The simplest answer - disable Wifi on your router, put an AP (Access Point) in one of the rooms you connected above.
Best homeowner grade answer
- Figure out where you need/want internet connections. Is your house one or two floors? Identify two spots (with data drops from step one) as far apart as possible but in the places you want coverage as best as possible.
- Parts required (in addition to the switch in step one)
-- Ubiquity Cloud Key
-- microUSB power source for Cloud Key
-- Uniquity Unifi AC Lite or Unifi AC LR (or even Unifi AC Pro if you want to mount one outside)
-- a second Unifi like the one you chose above - you may mix and match models
- Put the cloud key on an open port of your switch and plug in the power
- each AP will have its own power injector
- run a short ethernet cable from each LAN port back to the switch
- run another short cable from each POE port to the patch panel connection where an AP will live
- Put an AP in place at the other end of each run you've plugged into the power injectors, mount as appropriate
- read the cloud key instructions and setup your new, super duper wireless.