I'm not aware of a simple description/overview of an implementation that really goes back to basics. The answers to most things are buried somewhere in this thread, but it's 900+ posts long, so it's a bit of a challenge, especially when you don't know what you don't know!
What specifically are you struggling with? Is it that you can't visualize how all the pieces get put together or you don't know what pieces you need? Or what it's like to own and use this type of setup? If you can articulate the rough area(s) you're trying to come to grips with, someone here can probably take a stab at helping to bring things into focus for you.
Once you "get it" you'll wonder why you ever got hung up!