Setting up Access Point for my Wi-fi network

Today I’ve finally learned how to “bridge” two routers. One connecting to the internet trough ADSL and the second one providing Wi-fi on the other end of house, connected to the first one trough LAN. It’s pretty simple actually, yet without a guide I wouldn’t have done it - meaning either I am extremely stupid with computers!? - or the networking technology is not made for reasonably intelligent human beings.