The most valuable thing you can do is take a couple of courses in electronics at your local community college. This will lead you to physics etc. It will also help you understand those little bands of color on resistors, how capacitors work (build one?) and what transistors do. A basic understanding will help in many ways. Some colleges even offer classes in sound reinforcement and audio production that will help you understand microphone types, sound processing, recording etc etc.
Simple question, or is it...
What exactly is an audio signal made of, and what exactly is the medium it travels through in a cable??