I'm not the only one teaching music out there. There are so many great resources on the internet for learning music, and I encourage you to use everything that is helpful for your progress.
I have an app called Piano Planet:
http://pianoplanet.app
Best Classical Sheet Music:
http://sheetmusicarchive.net/
For method books, and modern music:
https://www.sheetmusicplus.com/
Wikipedia - Piano
http://en.wikipedia.org/wiki/Piano
Wikipedia - Musical Theory
http://en.wikipedia.org/wiki/Music_theory
Wikipedia - Musical History
http://en.wikipedia.org/wiki/Music_history
Wikipedia - Musical Tuning
http://en.wikipedia.org/wiki/Musical_tuning
Golfers Elbow - Piano Injury
https://tenniselbowclassroom.com/golfers-elbow/
Piano Map - Piano Injuries
http://www.pianomap.com/Injuriesindex.html
Andover - Movment
http://bodymap.org/main/?cat=34