Homelab

So I am moving into a new place that is too old to have riser runs but fortunately it does have Coaxial in almost every room.

My biggest concern is, I am trying to avoid as many wireless connections as possible. I have switches, hubs, everything I need to make sure any device with an ethernet port gets to use it! With coaxial in every room, I think it is possible to have my ISP modem in whichever room I'd find most convenient, right? But the big question is can I pull that internet connection in every room? Would I need a separate modem in each room I pull internet from, or is there some kind of router or something I can use to do the job? Is that even possible at all?? I'd really like to just run cat6e and be done with it but unfortunately I am renting so that isn't possible.

There is also phone line to every room but I am not getting anything done on 56k lol

My other question is, what is the easiest way to adblock everything at the network level, so that no devices need to run an adblocker of their own? Should I pass the connection through a small computer, or can I run it on something else?

This is my first legit foray into home networking past pushing buttons on a router and configuring wireless bridges. Please help me with my stupid questions! Thank you<3