I remember exactly how that felt! Only a year and a half ago I was in your position, although I was already almost done with my freshman year, I had just decided to pursue medicine. I remember thinking "how can I learn all this and be ready to take this test in 2 years? Much less how in only a few years could I be trusted to save lives?" Now I am half finished with my prereqs, and have done well at them. the information is truly staggering, but also interesting. To give you my perspective, I am finishing my sophomore year and have taken at the end of this sem Bio 1,2,3 and physics 1 and chem 1 and 2. I have a few classes left and I already study occasionally for the test. I do so mainly because I want this information to remain fresh in my mind over the next year until I take the test . I find this to work well for me. I own multiple practice materials, my favorite being the kaplan mcat complete prep book. I plan on spending about 4-5 months of intense study prior to the MCAT, and am debating on whether I will shell out $1300 for a course or just trust myself andtake as many practice exams as possible. I don't think it is ever too early to start studying, you just won't be able to effectively complete most questions until you finish those courses. I can really appreciate your seemingly tenacious attitude, as I am similar. I am obsessive/compulsive when it comes to this stuff, as I am sure many pre-meds are, and I think it is great to hear your initiative and enthusiasm. Hope my opinion helped, and Good Luck in all your classes.