Here's how to play one of my favourite U2 songs Still Haven't Found What I'm Looking For.
Here, we'll learn a super simple 3 chord version with E major, A major and D major with a capo at 4th fret so you can jam along to the recording too if you wish.
There's also an in depth delay + looper pedal tutorial here too, time stamps are;
Song tutorial with simple chords 2:58
Simple Lead tutorial Delay pedal (simplified) 12:35
Looper pedal tutorial 14:35
Delay pedal settings
Delay pedal settings I used on my TC Electronic flashback delay show below!
For the major guitar geeks - here's an awesome writeup of the guitar gear and setup of the Edge here