I'm searching for books that lead me to that, like harmony, voice leading, etc. RIght now I'm studying Harmony, by Walter Piston. It's a great book, but I need something that has an audio CD with the examples.
If you are absolutely determined to make a lawyer of yourself the thing is more than half done already. It is a small matter whether you read with any one or not. I did not read with any one. Get the books and read and study them in their every feature, and that is the main thing. It is no consequence to be in a large town while you are reading. I read at New Salem, which never had three hundred people in it. The books and your capacity for understanding them are just the same in all places. [...] Always bear in mind that your own resolution to succeed is more important than any other one thing.
As well, this could be a great opportunity to combine ear-training with your studies -- you could develop that pretty rare ability to "hear" what's on the page with much greater accuracy and precision than, say, your average musician.
And, not to say the obvious, but Piston's *Harmony* was used, and for all I know still is, quite a bit in music schools, and so forth. Many universities and colleges have all sorts of syllabi, exams, homeworks, and so forth online these days -- you could very legitimately "take" any number of classes that way, by doing the readings and assignments, if you have the motivation.
I suppose you can have guessed I'm a big fan of DIY, except for things like piano-tuning or home appliance repair, when I'd rather call in the experts. However, I think my perspective is a little out-of-whack, since I'm ignoring that I've had the benefit of private teachers and higher education of all sorts, and I'd be a liar if I said it didn't make a huge difference for me at a certain age.