Hi it might help you get a connection if you first set your internet connection without any security, then try watching some British internet content.
With wifi you don't need a home internet connection, tethering a mobile phone / setting up a hotspot with a 4G connection is like having broadband.
All very good ideas but all that is needed is a wifi dongle plugged into rear of box---go to network settings and locate the simple to use wifi set up/manager.which is self explanatory. Insert your login/password and away you go---if not satisfied with the reception then add a homeplug.
Reaper.