Hi shubhamg266,
Do you know which Schools you plan to apply to? I ask because once you have that list of Schools, you can research their individual application deadlines, scholarship opportunities, etc. That information will help you to plan out your overall schedule and give you an idea of the type of GMAT score you'll need to be considered a competitive applicant. Many Test Takers spend 3 months (or more) of consistent study time before they hit their 'peak' scores, so making sure that you've given yourself enough time to properly study is a must. Since GMAT scores are valid for 5 years, you could study now (and 'lock up' a strong score), then apply later on when you'll have the best chance to get into your first-choice School. Depending on how much studying you've done so far, a November Test Date may or may not be too soon for you to take the Official GMAT.
1) What study materials do you currently own?
2) What is your overall score goal?
GMAT assassins aren't born, they're made,
Rich