I personally believe a brick making tutorial was never made because so many people would start posting their stuff bricks whenever they make something. I really do believe in the ability to learn from something already provided-this is the way I learn, you might not be the same learner as me, but from what I have seen throughout the forums and ingame, I am just like everyone else in terms of learning-using this method, I have done many things, including learning to play the guitar, piano, saxophone, viola, mandolin, harmonica, understanding complex physics and chemistry concepts, learning to cook, learning french and greek, and learning to play football, soccer, and volleyball.
As Einstein kinda once said, "The best way to learn is not throught memorization, but by hands-on studying". I forgot what the exact words were because I'm not a memorizing kind of guy. Trust me, you will know how to do things better than anyone else if you just go into the .blb file and change stuff around one piece at a time, going back and forth between game and file, until you've learned every little bit of coding needed to create a brick.