I recommend learning intervals in the following order, adding more of them to your playlist in the following groups as you progress:
- Unison.
- Tritone.
- Octave.
- Minor 2nd.
- Major 7th.
- Major 2nd.
- Minor 7th.
- Minor 3rd.
What intervals should I learn first?
Start by learning major and minor seconds, because they are the “stepping stones” the other intervals are built from and they're the most common interval used between notes in melodies. Learn major and minor thirds because they're important for chords and harmony (and also common in melodies).
What are the rules for intervals?
Trick #1: Memorize the Rules Fast
Here are the six rules for the intervals of the major scale: Major Second: Accidental matches, except root E/B where it's raised one. Major Third: Accidental raised one, except root F/C/G where it matches. Perfect Fourth: Accidental matches, except root F where it's lowered one.