Hi gaoxx385,
A 600 is a solid initial CAT score (the Average Score on the Official GMAT hovers around 550 most years). That having been said, many GMATers spend 3 months (or more) of consistent study time before they hit their 'peak' scores - so you might end up needing more time than you have currently planned for.
When it comes to training for the GMAT, there are a variety of study materials that you might choose to use. Most GMAT Companies offer some type of free materials (practice problems, Trial Accounts, videos, etc.) that you can use to 'test out' a product before you buy it. We have a variety of those resources at our website (
www.empowergmat.com). I suggest that you take advantage of all of them, then choose the one that best matches your personality, timeline and budget.
Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
1) Have you done any significant study so far? How many hours do you typically study each week?
2) What study materials do you currently have access to? What “brand” of CAT/mock did you take?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich
Contact Rich at: Rich.C@empowergmat.com