Looking to get into music theory(self teaching) and was wondering if anyone knows any good resources. Anything is welcome like YouTube series', books, websites, blogs, etc. I'd rather it be in depth yet accessible as I'm proving my manliness by taking an AP Music Theory course next year.

guitar center has these books called "the guitar grimoire" that has a ton of music theory for the fretboard, after looking through them I'd recommend those definitely; even if you dont play guitar, it is a very versatile instrument, and it, along with the piano, is great for learning music theory.

This website is great for ear training and note recognition, look under the exercises.

The free resources page here has links to a number of decent theory sites.
Also try some of their online drills I found them quite helpful:
http://www.emusictheory.com/freeResources.html

This chord theory guide also helped me alot, well written, informative and easy to understand:
http://www.museweb.com/ag/chord_form.html

If you are a guitarist this site is super useful:
http://www.all-guitar-chords.com/