It's a very easy song for guitarists. And is usually one of the first songs beginner guitarists pick up. It got played a bit too much by too many beginner guitarists.
@SuperRobotSolo
Wonderwall was the go to piece of every solo guitarist back in the 2000s, to a point where if you saw someone with a guitar walking around if nothing else that person would know wonderwall.
Also what tlst9999 said lol. I dont know anything about the difficulty