Oh man, I've been learning and studying music theory for the past SEVEN YEARS. TLDR: I think the single best way to learn music theory is to learn to play pian

Oh man, I've been learning and studying music theory for the past SEVEN YEARS. TLDR: I think the single best way to learn music theory is to learn to play piano, and work with a teacher on weekly lessons. Do a harmonic analysis of every single song you learn and check it over with your teacher. THERE IS SIMPLY NO SUBSTITUTE FOR LEARNING WITH A TRAINED AND EDUCATED MUSICIAN. I learned this the hard way. > [I] have never been able to sift through a vast array of music theory blogs and tutorials to find something that made sense. I like to think of music theory as a LANGUAGE. Sifting through blogs and tutorials is kinda like googling "how do I learn Chinese?" yeah there's probably a lot of resources out there but it's not going to feel very productive to just dive in in this way. You wouldn't feel confident about learning Chinese using online resources so why would you feel confident learning music theory in this way? The real problem with trying to learn from online resources on your own is that there's no feedback... you will absolutely have gaps in your knowledge and persistent misinformation that cannot be corrected because nobody is monitoring your progress. Also learning from online resources can often feel hollow. For example, I can teach ANYBODY what a major scale is in 15 minutes. However, to truly and deeply understand the major scale can take years, it's more than just the rules about how to construct one. You have to really go over ideas many times and a teacher will be able to know your strengths and weaknesses and how to improve. If you learn piano from the ground up (use a book series like Alfred's Adult All-In-One) with a teacher, I guarantee that after those 3 books (which will take years to get through), you will have a decent grasp on theory. Don't try to tackle these books on your own, there's a lot of stuff that's not explicitly covered in these books. If you try to tackle it on your own I guarantee you that you will not get the full benefit and you will very likely teach yourself incorrect technique and you will be left with a lot of misinformation. You need to do harmonic analysis of every song with a teacher and get comfortable doing them yourself.