This is some good coverage of the music theory behind songwriting, which is important in making songs that sound good. However, there's another part of making music which is not covered at all here, which is the actual engineering of sounds. Think of a sound in your head and recreate it digitally—it'll involve sampling and synthesizing, there's tons of filters and sound manipulation to go through, they all go by diff…
What I found was that as your music making experience unfolds, you start amassing these little tricks here and there and they're only yours, usually tied to your stack of tools and the way you think. That is extremely hard to replicate and also very personal, imho that's why it's so difficult to actually pass that sound-sculpting knowledge to others, and that's why (besides the odd youtube tutorial on how to make a specific sound -- usually targeted at a specific vst, explaining which knobs to turn), we won't find many general sound sculpting learning material online. Even tho it is available if you gather around from forums and etc, it is still pretty much a personal experience.
Answering your question: As the time passed, the endless experimenting diminished and I got a proper sense of what does what, and after 5 years making music I'm more able to pinpoint what I need to fiddle to transform the sound the way I want/imagine in my head.
I'm still not quite there yet but if I can offer one piece of advice, that is: Don't shun the 'endlessly experimenting to find a sound'-thingy, because that's the best way you can grasp the tools. Over time you'll be able to get there faster but it's a necessity..
This is how much I evolved, without even noticing, only making tracks after tracks:
Sep 07 / 2012 http://codegrub.org/flipbit/musicmaking/equal02.mp3 cringe
Mar 25 / 2017 http://codegrub.org/flipbit/tracks/flipbit03%20-%20Twothousa...
cya o/