As someone else said you are young and you would not be expected to have a work history. Looks like you were smart and went right from high school to college

And you are lucky enough to know at a young age what it is that you want to do. Enjoy the fact that you can focus only on school and not have to worry about making money! If you can over over the summer do the volunteering or tech job. I know there were a few girls in my nursing class that came straight from high school and they only had some work experience in restaurants and such. And if it makes you feel any better I am 29 and had no experience in the hospital setting, yes I have a work history, but no medical background and I had no problem getting a job. Someone else also said that they will not expect a new grad to know much and they will train you. Good luck!