BEfore you make this change, you really need to either volunteer, shadow a nurse, or work in the health industry. IF you think teaching is not for you, nursing is a huge culture shock. Nursing is nothing compared to what you see on t.v. WHen most people actually work in the health industry they are actually surprised and shocked because it's really all about making the money and politics.
The fact that you are giving up teaching after less than a year after going all the way for your masters, means that you need to be cautious with your decision-making skills. If anything work as an CNA, and you will definitely see what the health industry is realy about.