I found notes written by boom operator Ian Thompson on lectures he did for a film class. They are very beginner friendly while still offering some more advanced information, and his emphasis is not on equipment but the process. I found them a very good read as they are concise and gathered many important aspects in one place.
http://www.thompsound.com/old-site/Articles/QSFT/index.htm
Enjoy!
http://www.thompsound.com/old-site/Articles/QSFT/index.htm
Enjoy!