So I believe I live in an house that was built around 1930-1949 (according to a website) Will powerline work okay with an house of this age?
Powerline adapters should always be directly into the wall outlet, get ones with a power outlet passthrough and then use a multi adapter into the powerline if requiredIt turns out the wiring was replaced 12 years ago, when I moved in, so I believe it may be okay for powerline, I saw that extension cables can alter the connection, how about one of these?
Adaptor 2 Way 3 Pin (toolstation.com)
So one like this TP-Link TL-PA4010PKIT Passthrough Powerline Adapter Starter Kit, No Configuration Required, UK Plug, Pack of 2 : Amazon.co.uk: Computers & AccessoriesPowerline adapters should always be directly into the wall outlet, get ones with a power outlet passthrough and then use a multi adapter into the powerline if required