Hi suraya,
When it comes to studying for the GMAT, there are a variety of different options that you can choose from. Is there any particular reason why you're only interested in a tutor (which will likely cost you more money than most of those other options)?
1) Do you have an Official Test Date scheduled yet (and if so, then what is it)?
2) 1.5 months of study time is not much, relatively speaking. Are you on an application deadline?
You might find what you need in a self-study Course (which would allow you to study when your schedule allows). 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 out site (
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.
GMAT assassins aren't born, they're made,
Rich