Bb Minor

The first shape is the easiest voicing: 4 fretted strings and 0 open strings. Put your pinky finger on the 3rd fret of the G string. Put your index finger on the 1st fret of the C string. Put your index finger on the 1st fret of the E string. Put your index finger on the 1st fret of the A string. Strum all four strings and check each one rings cleanly.

Bbm is Bb, C#, F. That is a minor triad (root, minor third, perfect fifth). Play them in any order and you still get Bbm. Bbm sits in the key of F major.

A minor chord stacks root, minor third, and perfect fifth (1–♭3–5). In Bbm that is the notes above. Soft and melancholic: the emotional counterpart to major. Adds depth and longing. Raise the third and the same family becomes major.