Verbal Reasoning

Hi,

I am from india and planning for a GMAT test in August.
I have started to study this month and as adviced took 1st diagnostic test from GMATPrep.
But my verbal scores are horrible and need urgent attention.
Here is my verbal breakup:

Total correct Questions:13
Attemplted Questions:36
Unattempted questions:5
Breakup of correct Questions:
S.C. = 6 out of 14
C.R. = 3 out of 9
R.C. = 4 out of 13

As this is really disappointing i am planning to study as follow for next few weeks:
SC: OG11 + MGMAT SC
RC: OG11
CR: OG11

Need feedbacks from the forum about any moderation in the plan.
Also give me advice on how to approach each section.

Thanks,
Sam