^Bingo. The time it takes to review a practice test is variable, but it generally takes no less than it took to take the exam. You need to review the answers you got right and ensure that your mentality was the same as the AAMC and/or was accurate and led you to the right answer precisely.
You need for review the answers you got wrong (obviously) and think about exactly why you go them wrong. What were you thinking? What was your justification for choosing the answer that you did? Did you misinterpret the question, did you make a simple math error, did you not know the content? These are all questions you must answer to get you started on figuring out how to get better.
And finally, you need to review with the hope of internalizing the AAMC's mentality. Once you are able to read questions as if you helped write them then the answer becomes a whole lot easier to find. You can get to this point by a whole lot of practice and exposure to a lot of different questions (+ noticing how and when certain language is used and repeated).
Review VR the same way.