Hello
Coming to your GMAT prep - First of all tell me how long have you been preparing and what do your individual quant and verbal scores look like. How frequently are you taking practice tests? Nearly all students begin their GMAT prep with a mock score in 400 - 600. So don't worry if you have have only made it to 600 in two tests.
Also, it looks like you are studying on your own. With a gap of 13 years from maths, i would advise you to take guidance from a decent tutor or coaching center. Solving these questions isn't only about knowing the concepts but using specific tricks and methods to solve these questions faster as time is of the essence.
Reaching a score of 700 is not possible with only two weeks of preparation. I would advise you to study consistently for at least two months, taking practice tests at the interval of 7 - 10 days to gauge your performance.
I am not sure, what you mean by choosing a specialization. most people chose a specialization depending upon their post MBA goals. So tell me, why do you need an MBA and what area industry would you like to enter post MBA.
Do get back to me
All the best
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