Playing in terms of stacked intervals and not “chord names”?

Uber piano beginner, came from guitar

My playing consists of playing diatonic chords and inversions on my left hand and noodling to the changes I make up with my right hand, I’ve been trying to break out of just playing diatonic chord changes by learning secondary dominants,

But today I played a cmajor and c#minor chord and noted they sounded nice because the 3rd stays the same, and it made me think that learning how to move around by stacking intervals is probably much better than what I’m doing which is essentially like root -> 5th -> fill in what note I want between -> extension if I want

Is there a resource for this or a specific topic I’m trying to get at but can’t articulate?