What chords should you learn first on the guitar?  Good question.

Answer:  G, D, Em, and C

Learn those four chords in that order and you can play a million different songs (see video above for proof**)

Switch up the order of the chords or take one or two out… now you can play a billion different songs.

To make the quickest and most effective progress, start with those four chords.

You can learn to play them here, here, or here.