Music theory can be puzzling at first, but you can learn lots about it here! If you’re brand new to music theory, start with Chapter 1: An Introduction to Music Theory. You may also find it useful to download my free “All purpose Guide to Music Theory”.
Chapter 1: An Introduction to Music Theory
Chapter 2: Clefs
Chapter 3: Note reading
Chapter 4: Time signatures
Chapter 5: Keys and key signatures
Chapter 6: Downloadable manuscript paper
Chapter 7: Downloadable key signature chart