To get into the program, you will NEED level 7 IELTS in each area, this is non-negotiable. So, if you want to be a nurse, you simply need to work on your English. The only way to be registered with the Nursing Council is to actually be a registered nurse (or enrolled nurse, nurse assistant or nurse practitioner, but RN is the most common). You would need to do the Bachelor of Nursing and pass State beforehand.
However, my usual recommendation to people interested in studying nursing is to decide whether or not they actually want to be a nurse. I say, if they are not sure then they shouldn't bother, however if they are then they should go for it.