Dm (D minor) chord is a simple triad that is very easy to play in an open position.

What is Dm chord
- Chord formula: 1 – b3 – 5
- Chord notes: D – F – A
- Alternative names: Dm, Dmin, D−
- Common functions:
- i-chord in D minor key
- ii-chord in C major key
- vi-chord in F major key
How to practice Dm chord
Finger position for D minor chord is fairly similar to D major, so it is a good idea to practice changing from Dm to D and back.
Perhaps a bit more practical exercise musically is to change from C to D back to C (I-ii-I), or from Dm to Am back to Dm (i-v-i).