I like to write and I would be happy to help out with this project.  I will write to your email and we can take a stab at collaboration.  My expertise is limited to what we in the U.S. call "art music" for lack of a better term -- what is also referred to as "classical" which is also terminologically confusing because the classical era is really a subset of all art music.   I have seen students struggle with terminology and therefore hate music theory when really it can be quite rewarding once you get beyond all that.

Melody and harmony are abstractions.  The books on harmony by Heinrich Schenker and Arnold Schoenberg are probably too technical for most people but they shouldn't deter an intrepid explorer like yourself.

I personally don't like Stravinsky's conducting that much (I only watched a little bit).  He elicits a performance that is a little too emotionally sterile for me.  But Stravinsky is one of my favorite composers.

And now for something completely different:  a sung melody with supporting harmony played on piano (I'm only referring to the first song in this clip -- this was by far the best performance I could find on YouTube):