I found this accidentally and a little late. Chords are the same for all instruments. But to study them is best at a keyboard instrument. You need to basically study the rules of harmonics.

• major and minor chords (like C major and C minor)
• relative minor chords to major c chords (like C major to A minor)
• dominant seventh chords (like C7)
• barber shop chord progressions (like from F major down to D7 major and through G7 and C7 back to keynote/tonic F major)

These are basics and if you know the rules you can figure out what notes to play to the note of a melody in order to match the chords of a musical piece. Every tune has their very personal chord progressions. You need a sheet with the chord progressions of a tune in order to find out what notes co combine. Or you have a good ear and experience to do it off the cuff.

Chord progression like for instance for House of the Rising Sun:

For more complicated harmonics (especially in jazz) you need to study quite a bit more:

• diminished chords
• augmented chords
• sus chords
• As there are special cases where you combine two different chords to one.
• As you can add extra notes like major seventh and ninth