I'm not saying these things to scare you away, but here is my experience...im currently preparing right now, and will take the test in june.
It's rough as hell. Just to learn the content will take forever, and I studied about 8 hours a day, while going to school at the same time, and having 2 parttime jobs. I hardly slept.
Then, doing practice tests usually takes about 5 hours, and then takes about the same amount of time to go over each of those tests, to see where you went wrong, what you could have done better, and how to avoid your mistake next time. THen, it takes time to go back to the content that you had trouble with, and study again.
Whatever you do, practice the verbal section as heavily as possible. Thats my weakest section still, and i have worked the hardest for it so far. Do at least 3 passages a day to start off studying per day, and then slowly increase to about 8 passages. The actual MCAT has only 7 verbal passages, but doing 8 at a time builds stamina. I highly recommend the Exam Krackers strategy for verbal - it may seem like crap at first, but it works if you keep practicing and practicing.
Once again, im being as realistic as possible with you, given my experience with studying. Now, you may have an easy time with verbal. If thats the case, then study the sciences hard, and keep doing practice problems.
Hope this helps.
Goodluck!
-T