I know, not much. But hopefully in the next month-or-two our fibre connection can finally be finished. This is what it was like before we moved house, and what it'll look like when fibre is installed:
As you can see, we rely a lot on WiFi, which myself and my brother personally hate due to reliability issues. So I have been looking into wiring our rooms up with ethernet, and since I'll be having my own network separate to the rest of the household I have planned out what I aim to have it look like:
The main idea of this plan is to use WiFi primarily for a redundancy connection than relying on it to supply the whole household. As for the actual components, I have no specifications in mind as of yet, as I'll require more research beforehand, perhaps looking at purchasing second-hand for the server/server-side switch (I'm open to suggestions though...).
If your plan is to fix your household wifi, I don't see this new sketch doing it at all. You are rather focusing on the cabled network.