IMO, chords are the way to go. If you know chord progressions you can play any song and come up with a guitar part for it. I suggest you start out learning one key and the associated chords and go from there. Key of C is a good one to start with though the IV chord - "F" - is a bit hard to play for most people initially. But all the other chords in the key are pretty easy. If you learn the I, VI, IV V progression, which in the key of C is C, A minor, F, and G, you can play a heck of a lot of well-known songs. Add an E minor, D minor, E major, A/A7, and D7 and you could play just about any song there is though would be playing it in the key of C which might not be the original key. Of all those chords, the F is the only one that could be called "hard" and that will go away rapidly with a bit of practice.
Good Luck!