Which chords go together?
I've been taking lessons for almost 2 years. I cant understand what chords sound good together or what chord comes after the next.
The question that you are asking is about "Chord Progressions". There is a detailed discussion of how to understand chord progressions at:
Music Chord Progressions.
This is a free lesson, so check it out and then if you have more questions, please feel free to write again.