>>14 Keep at it and you'll get it in time! Don't worry about where your brother is, you just keep on with yourself and you can do it. Think of it this way: you're learning what is believed to make music function. The history, why composers could have done what they did, and the like. Think of it as an adventure. It's a lot of fun for me.
>>15 Good! I'm glad that you're having fun with it! And you're correct in saying that there's no true "order," but the human ear has a tendency to hear certain cadences and the like, and often times (as is the case with through-composed or progressive music)most people can't listen to it because they need a certain amount of repetitiveness involved.
>>17 Personally I would disagree with him being the "best use of Music Theory," but that's me. I'd consider Prog-rock/metal or jazz musicians to make the best use of Theory (examples would be Between the Buried and Me, Coheed and Cambria, Bill Evans, and many others, I'm sure), classical musicians aside.