I got my Master's as a Family Nurse Practitioner and some physicians need them in their office and as an assistant in surgery. Check out that option. You would need to choose a specialty and learn how to scrub and assist proficiently but you could start gaining information now.
Berry and Kohn's is a more easily readable book than alexander's. The AORN standards are subject specific and will only educate you to specific standards of the specialty. CCRI has a new book out, check their website.