Am I approaching MCAT studying all wrong? Taking test on Jan 20th, no practice tests taken yet.

Ok so I am taking the January 20th MCAT. So far I am about 40% through the Kaplan 7 book set minus CARS. I plan on reading EK CARS. I have yet to take a single FL because I figured taking it before content review would be useless. I wanted to at least get through the books once through before taking diagnostics; this is because I felt my grasp on the content wasn't all that good due to a lot of cramming while taking the courses. My only practice with questions so far is a couple KA passage... Am I approaching MCAT studying all wrong? Taking test on Jan 20th, no practice tests taken yet.
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