I think you should go to tutoring and get help on math. To become a nurse, although you won't necessarily need to take Calculus, but you do need to know the basics of mathematics. In order to do that, you'll need to watch more videos online and practice more math problems at home. There are many resources nowadays and it's easy to find them on your own. You can use the tools online to help you on math. Just go to Khan Academy and see all the materials online. You'll find lots of topics covered in basic mathematics, Algebra, Geometry, Algebra II, Trigonometry, Pre-Calculus, etc. Many students often go there to learn more about the topics that they've missed when they were in school. Or ask your school counselor about finding a math tutor and after school tutoring programs.