a bachelor of health sciences in nz allows you to become a nurse if you sit your state exam you wil become a R.N or registered nurse. then you may do post-graduate studies in your field of choice ie if you are interested in working as a paediatric nurse you will be able to work as one in a hospital whilst completing your post graduate papers. If you find an area you like you may want to do your masters then a doctorate :)
Through NYU, the Bronx Zoo offers month-long classes to teens ages 13-17 who are interested in animal care and animal sciences. They also have a pre-veterinary program through the Robert & Ellen Salant Prehealth Program.