Yeah, looks like the image that you tried to include never made in onto your post.

Correct, unmanaged Ethernet Switches are plug-n-play.

And you do not need to run Cat6A patch cables, regular Cat6 or even Cat5e cables will be just fine.

If your room is setup as an apartment with its own plumbing/cooking, etc. and it has its own official postal address, then you should be able to sign-up for your own personal Internet service.

Otherwise you and the other renters need to get together and have a discussion with the building owner and ask to have better Internet access setup in the whole building.

And the best way to make this happen, is to have someone come in and run dedicated Ethernet cable drops installed to each individual room.