I don't know which genre you like, but Smoke on the water by Deep Purple has to be the easiest. By the way, this guy also played a little guitar.
I play a little guitar. What are some easy songs to learn? Thanks in advance.
https://www.youtube.com/watch?v=boanuwUMNNQ
Now listen to this version.
https://www.youtube.com/watch?v=8eOIU9ekSMk
Chords here:
https://tabs.ultimate-guitar.com/t/thin_lizzy/whiskey_in_the_jar_crd.htm
I earned lots of free beer singing this (around 35 years ago)....