What can I do to prepare for this class?

So I am going to be taking a class that I would normally take when I would be one or two years older. However, I am going to take it in the fall. I do not have the textbook and the subject is biology. I am pretty good at it, it's just I have some trouble with math which I know we'll be using a lot of. I also don't have the best handwriting and I know my instructor likes neat handwriting any way to improve that? Also anything that might help me be ready to go into biology? AND any tips for having to go into a class with older people?