Bugle Notes, or Plebe Knowledge, are indeed a booklet full of a wide variety of info. My DS tells me that there is plenty of time in Beast to learn them, and while some cadets arrived at Beast with quite a bit of knowledge already learned, it didn't set them at any distinct advantage, although for those who (a) took the opportunity and (b) were allowed to by cadre, it presented an opportunity for those to help others who may have been struggling. That said, not to worry, you will have plenty of time and "motivation" to learn the required knowledge. Not a priority right now.
// PS, my DS just graduated -- WOW! what a ride //