the goal of taking FL exams, especially by 3rd party providers like Kaplan or Next Step, is to gain familiarity with the structure, timing, and length of the MCAT, as well as to identify content gaps. I am highly skeptical of the predictive value of third party exams. Kaplan is pretty notorious for having their free FL exam score deflated to help push you to buy their resources.
as the poster above mentioned, you’ve got two solid months. During this next month, finish content review and start taking practice FL exams. i used Next Step because of the experimental passages but other third party exams are fine. Use them to get used to the pacing and to identify areas of weakness that you need to fill in. Get a subscription to UWorld, it has over 2000 practice questions and passages. Use it to take simulated MCAT sections (59 questions for CP, BB, PS in 95 minutes) to practice pacing and to identify content gaps. Start AAMC cars question pack, it’s the best practice.
When you’re 6 weeks out from the MCAT, take your first AAMC FL exam to see where your at. At 4 weeks out, switch to all AAMC prep materials to understand the test. Take a FL exam each week under timed conditions. While the score on these exams is important try to pay attention to the trend and aim for an upward trend. An encouraging sign is when you see scores go 505, 508, 512, 515.
as an aside, I took a kaplan FL and scored a 493, took Next Step FL exams and scored between 503-507, and then never scored below a 510 on AAMC exams. third party exams are just different than the MCAT and I found the MCAT exam to be a much more reasonable exam.