Is it possible to make a router-router-proxy for a wifi point?

Question

WiFi

At home there is a wifi point, which is distributed to several apartments. Not mine. I connect to it from different devices at the same time.
I want to make something like a router-router-proxy for her. That is, somehow connect this router-router-proxy to this point via wifi (I think), and I myself will be connected to this router-router-proxy, and not directly to the wifi point.
What for?
1) Experiment
2) Install some software on it, for example, which cuts ads.
3) Anything else.
Yes, it will still be possible to connect to this wifi point directly, I know.
So what kind of device do I need to do this? Router? Router? I don't know much about iron.

Answer 1

You need a device that has two wifi interfaces. One to connect to your existing point, the second to distribute the network to connect to you. I can offer to try Mikrotik, the same rb-911. On it, you can create several interfaces on the existing wifi, send one to client mode, and make the second ap. Well, the option for installing software for experiments - the easiest way is the same Mikrotik. There is a metarouter mode, you can put a virtual openwrt, you can figure out how to insert a computer into the gap ...