Slow down a bit. First, what is your major, and current cumulative GPA? Message me privately if you don't want to give out that information here. The minimum coursework you need to take the MCAT are Physics I and II, General Chemistry I and II with lab, Organic Chemistry I and II with lab, General Biology I and II with lab, Biochemistry, and a course in statistics. You also need to have completed Psychology and Sociology to be prepared to study for the behavioral science section of the MCAT. Those are bare minimums. I would also suggest completing courses in Human Physiology, Genetics, and Microbiology BEFORE you begin studying for the MCAT. Most people take a light load the Spring of the Junior year to begin studying for the MCAT, so 12 hours is a good load to take if you are used to taking 15-18 credits per semester, which gives you time to study about 10 hours a week. The average study time for the MCAT is 400 hours, with a range of 300-500 hours. Some take MCAT prep courses as well, but I didn't. Most people take 10 full length practice exams before taking the MCAT, which are 8 hours per exams, so 80 hours of that 400 is taking exams. The CARS books you buy are 10% strategy and 90% CARS MCAT sections. Google and find recommended MCAT study schedules, because without a review class you need to structure your time, and those schedules will suggest spending 25% of each day or 2 hours per day working on CARS practice, so 25% of the 320 hours or 80 hours on CARS. Then most schedules will have you rotate thru each of the other sections of the MCAT on a weekly basis, so not 2 weeks of solid physics, 2 weeks of gen chem, 2 weeks of organic, etc. Instead, rotate thru on a scheduled basis and stay on track. 12 weeks is ideal.