You are off to a good start!
Just a thought...
this is very mechanical...unbolt a song, take it apart Take and listen to your fav, Beethoven's 9th , listen to what he is doing and take notes;
1. how many times is the melodic phrase repeated, what new thing is introduced each time (loudness, instruments, new notes, less notes, timing, etc. how many measures ie. 1234,1234,1234)
2. Chorus;( or the new different type of music inserted into the piece) take notes; what's going on, does it repeat, instruments, tempo, loudness, etc. how many measures
3. 2nd melody, what's going on here?
Song Structure: A,B,C,B,A,A or what ever.
(A=primary melody, B=Chorus, C= 2nd melody, etc.)
There are common structures that tend to make music comfortable to listeners by meeting their subconscious expectations...If you unravel Beethoven's 9th this way, you will have a greater understanding of music. Then apply the lessons to your music. Beethoven was a genius, his music was simple and accessible by all, yet so complex, it is hard to imagine how he felt and put together all the nuances to make such great music.
Hope this helps in some way.