Will the choices I made allow me to be succesfull

I am a student that will be entering school as a sophmore next year. I had sighned up for AP statistics, AP, chemistry, and WHAP. As a freshman I was only able to take one Ap course and that was Ap Human Geography I was able to get a 5 on that test. I would not consider my self a extremely smart student but I consider myself Hardworking. MY question is will hardwork make me succesfull enough to score at minimum in the low As(91+)?

For Ap chem: What should I do to prepare for the class in general and should I buy prep books already?

For Ap stat: I was not the best at Algebra 2 as a freshman butI was able to finish with an 85 is that sufficient?

For Whap: How should I work to make sure that I am able to succede in this class and on the test?

Also on a side note I was planning on pre-ordering the princeton review prep-books for all of these classes for the AP exams but could they also help me prepare for the clases in general?

All Feedback is helpfull Thank you.