Any advice on preparing for the A2 Nursing entrance exam?

So I bought the Hesi Evolve Reach Admission Assessment Exam Review and am studying through it so I can take my A2 test before the end of this summer. I am just worried because my Biology, Chemistry and Physics skills are not the greatest. I hear people say the exam review is not worth it because it has nothing to do with the test. How am I supposed to prepare myself if I feel like what I am studying is going to be nothing like the test. I do not have any old notes in any of the topics, but I have gone on youtube for some of the biology information. If anyone has studied this exam review and taken the test could you help me out? Thanks :)