Running ethernet through my house

I’ve been planning to run Ethernet through my house for a while to fix slow speeds at the back. My router is currently at the front, and Wi-Fi boosters haven’t worked well, so I’m going down the wired route.

The house is about 300 m², single-storey, with plasterboard internal walls and some brick (which I know isn’t great for Wi-Fi). I’m planning to run cables through the roof and install a few ceiling-mounted access points to get a consistent ~500 Mbps connection across the whole house. I’ll also be running Ethernet to devices like my PlayStation and a network switch. I also wanted to move parts of my home lab into a different room so it’s not all clustered altogether.

A few things I’d love advice on:

•	Would 2 access points be enough, or should I plan for 3 given the size and brick walls?

•	Is Cat6 the right choice, or should I consider Cat6a for future-proofing?

•	Any general tips for running Ethernet through a roof space (especially with heat in mind)?

•	Is there anything I should be doing now while I’m in the roof (extra runs, conduit, etc.)?

Planning to run everything back to a central switch near the router.