You should do some serious content review. I did Saunders. Don't believe you can get 60% on practice tests and that will be enough. You need to get more like 80%. If you are going to pay for a review course then you want to make the best of it. Review courses don't cover everything, just the major stuff. So a good content review book, app, whatever should be done. After all the prep, remember that the test is about critical thinking and it is possible to fail even though you know all the content. I did Saunders and www.learningext.com
. This is from the people who wrote the test. Passed at 75. Good luck!