Just chiming in to say that you don't necessarily need musical training or production training to write good stuff.
I had never taken a single music lesson, musical or otherwise, until last semester when I took Music Theory 161. It helped a little, but I can't say it was necessary. For me it was just having somewhat of an ear for music and a year or two of experimentation and practice.
Then again, reading up on some stuff like on the Tweakheadz site probably would have helped me get going faster, so definitely keep that up. Nothing can beat actually digging into the program itself and learning that way, though. Good luck.