If I Have An Ethernet Socket Which WiFi Extender Should I Be Using?

[SquirrelMadness]

My room has Rockwool which obliterates the WiFi signal but I did install an ethernet socket during refurb... should I be using an extender that plugs into ethernet? Or just get any old extender off Amazon?

Would like to keep top speeds too. Don't trust Amazon reviews.

 

[SquirrelMadness]

I don't know whether to get an AP type or one that plugs into a 3 pin socket. I just want a strong signal.

What I do know is that if it's an ethernet type I don't want it to also plug into a socket (too many cables dangling). So should be power over ethernet (from the router).