(sorry for some of the pictures apparently they stopped working on me, and yes some are from the internet)
Step 1: #1 - Why?
Step 2: #2 - Knowledge of Music
If you already know how to read music well skip ahead to the 4th step(not 4th page 4th step!)
Step 3: #3 - The Basics of Music
The guy really is good, i had no idea how to read most of Trebele before i watched the video(I have always played a bass-clef instrument
There is a ton more out there to learn( I'm not going even going to go into key signatures or sharps or flats), i recommend either watching the rest of the guys video's above, which i haven't done much of, or buying a book about, reading online, or like most musicians go and learn to play an instrument...
Excuse the blurry photos