If you do not have the raw scores then that's fine because 380 is definitely a score that needs polishing in the Quant as well as Verbal part regardless of individual scores. So go ahead and make your study plan. you could take a test after about 3-4 weeks of study.
I think Cracking the GMAT is a very preliminary book. Since you've already ordered the books, you shoould go through this book once it arrives. It gives an overall idea about the topics tested on the GMAT, but that's it and this book does not go further. You would need some solid study guides. I would recommend the
MGMAT books. I think even the Veritas guides are good(costlier option). If you are tight on a budget, then just go with the
MGMAT number properties book and Sentence correction book. I did not recommend that
MGMAT word translations guide becaise I , personally, did not find it much useful. Ofcourse, it is a decent book for probability, combinatorics, word problems etc. I'm not sure how you are in other quant areas like Inequalities, probability, work-rate problems etc. Depending on how you progress, you could order other
MGMAT books later into your study.
Data sufficiency generally involves some strategy as well as Math concepts. overall, you will need to polish ytour math. RC is little hard to improve, but not impossible. I went from getting all wrong in RC to all correct or 1-2 wrong

. I just used the OG for this. For practice, you can also consider buying RC 99 later. Also, the
MGMAT RC book does a decent job(not a great book). If you are particularly interested in an RC book then this would be a good choice.....
Hope thAat helped....good luck