Hi Watermelonss,
Unfortunately, the Diagnostic Test at the beginning of the OG isn't a great way to establish a 'baseline score' - the number of questions isn't correct, the pencil-and-paper aspect of it isn't realistic, the Test doesn't adapt, it's not a FULL Test, etc. As such, to get a more accurate assessment of your skills, you'll want to take a FULL-LENGTH CAT (including the Essay and IR sections) sometime soon (maybe this weekend). You can download 2 for free from
www.mba.com (and they come with some additional practice materials). A FULL CAT takes about 4 hours to complete, so make sure that you've set aside enough time to take it in one sitting. Once you have those scores, you should report back here and we can come up with a study plan.
I'd like to know a bit more about your timeline/plans:
1) What is your goal score?
2) When are you planning to take the GMAT?
3) When are you planning to apply to Business School?
GMAT assassins aren't born, they're made,
Rich