I think you would benefit from a longrod at least, currently your bows reaction after the shot will not be rolling forwards hence hitting your arm.
You can always put your questions direct to KL at
KSL International Archery there is a lot of information on the site to help followers of the book.
Good luck following the book, personally I think it is very hard to follow without a coach to help, even in the States KL spends a lot of time teaching coaches just to understand the basic principles.