Dear Vikrant, I suggest you to prepare your one group first. Take it seriously. When you will really be in position to decide yourself about one or both, i mean when you will be having much confidence regarding one group, then start preparing another. But dont ever let the first group loose at any time.
This planning is more helpful in case of self study, as per my personal experience. In case of coaching, let other views come, because as per my personal thinking coaching is more or less wasting time. Thefore, I dont have much idea about study with coaching.
Regards,