do both, study intense for 6 weeks, and then take your medicine rotation and study intense during it and take the step 2
not a good idea taking step 2 without taking the medicine rotation
6 WEEKS! Wow! The feeling around my school is to study for 3 weeks MAX (even if you want to do really well and actually care about your score). If you read the Step 2 scoring thread, you'll see that most people study for a period of 1 to 3 weeks. Good luck. 🙂