Learning the B minor chord will allow you to play any other minor chord on the guitar.
A minor is a great chord to learn because it’s easy, commonly used, and has (basically) the same fingering as an E major chord.
The D minor chord: dark and stormy and pretty easy to play.
Learn how to play the open C chord, one of the most important open-string chords.
The first step in learning how to read music is to understand the various symbols that are used in music notation.