Q: i know that minor 7 and 7sus4 chords can sound so good like how you use them in new canaan how can i do that
A: it's pretty normal. the way to learn to do it is by learning/hearing/playing many many songs. for best results, cast the net broadly through time, at least 100 years worth of music, up to the present. the reason i'm suggesting this is because, over time, people do things in slightly different ways, but if you broaden the time scope you will really see the commonalities coming through with how to express yourself through music. and all this will feel very familiar to you