Hello Kylie - It is a wonderful time to get into nursing, as there is such a demand for people with these skills. Also, there are so many specialties, that you can really find your niche in which to thrive.
I did some poking around and found that it is recommended to take the TEAS test early, like in your freshman year of college. The results are good for four years after you take the test. Get it out of the way so you can focus on your prerequisites because it is important to do well in those classes to help you do well in nursing school.
Perhaps you can connect with the nurse at your school or doctor's office, and ask a few questions in person? I hope you follow your passionate path, as you can make a difference!