Again, we have a new chord form to help us expand our sound map in our musical minds and on our instruments. Don´t worry about the names of these chords or the theory behind them – focus on the sound.
As I always say, the first step in music is to let your ear be your text book. Focus on internalizing the sound of the notes and developing the skills to play them. Later, if you are curious, there will be plenty of time to read about music theory.
The notes in this chord are D, G, A and D