Hi Shreya,
To start, a 530 is a solid initial CAT score (the average score on the Official GMAT hovers around 550 most years). Since it's been about a month since you took that CAT, you should plan to take a NEW, FULL-LENGTH CAT sometime soon (perhaps this weekend), so that we can get a sense of how effective your studies have been so far in helping you to improve.
The
OG books are great sources for practice questions, but they're not designed to teach you Tactics, patterns or the little 'secrets' behind the GMAT - for those, you'll need Course-oriented materials. To that end, you might want to work on the
OG a little later on in your studies. From the list of study materials that you plan to work through, you're going to be 'jumping' from source to source - and since there will likely be inconsistencies in style, terminology, format, Tactics, etc., you might end up making your studies more challenging than they need to be. This is meant to say that you might want to commit to one Study Plan/Course that covers ALL of the subjects that appear on the GMAT.
Statistically-speaking, raising a 530 to the point that you can consistently score 730+ will likely require at least another 3 months of consistent, guided study - and you'll have to make significant improvements to how you handle BOTH the Quant and Verbal sections. Thankfully, the GMAT is a consistent, predictable Exam, so you CAN train to score at a higher level. You would still have time to make the Round 2 application deadlines, but a September Test Date might be too soon to be considered realistic (so you might want to consider pushing back your Test Date).
1) Going forward, how many hours do you think you can consistently study each week?
GMAT assassins aren't born, they're made,
Rich