What got me when I first started learning is to understand the difference between sound synthesis (which this link is basically for) and music composition. Maybe you're asking for something in between the basics of sound synthesis and full music composition. There's also all the different aspects of composition like drum arrangement, chord progression, melody creation, general music theory, etc.

I've collected some notes on what I've found so far [1] but be warned that I'm not a musician nor have I made anything that I would consider even remotely passable as music.

Here are some links that I found helpful:

* David Clements. He recreates many songs on his Studio Logic Sledge but it's applicable to other synths as well. Here's one where he recreates the opening to Stranger Things: https://youtu.be/HGufVBDfPvs

* InThread. A forum for Sonic Pi users. They have many coded examples of scores that can be used as a reference: https://in-thread.sonic-pi.net/

* Lines Forum. A forum of synth enthusiasts: https://llllllll.co/

* How Music Works. Goes from sound synthesis to composition/music theory: https://www.lightnote.co/

* Dylan Lane on melody writing. Don't let the Youtube personality or religiousity turn you off, she's knowledgeable and had many useful tips: https://www.youtube.com/watch?v=qlrLHhpp8-E&list=PL5PNXIkCYn...

* Signals Music Studio. More music theory oriented but I found it very helpful: https://www.youtube.com/watch?v=lPDVo-7Ua28&list=PLTR7Cy9Sv2...

* Open Music Theory http://openmusictheory.com/

* Some other algorithmic music generation links: http://maximecb.github.io/Turing-Tunes/ , http://maximecb.github.io/Melodique/ , http://www.playonlinedicegames.com/mozart

[1] https://github.com/abetusk/dev/blob/release/notes/MusicNotes...