Hi DjWater,
Studying for the GMAT now - far in advance of when you will actually "need" your Score - is a smart choice! In that same way, if you are interested in some highly-competitive Schools, then you would likely find it beneficial to speak with an Admissions Expert about your overall profile and plans. Those Experts should be able to answer your Admissions questions and help define the specific areas of your profile that could use some improvement (and the more time that you have to work on those individual areas, the better). There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/Since the overall content of the GMAT has not changed much over the last several years, you might be fine working with the current materials that you have. However, that immediate study plan sounds 'book heavy'; unfortunately, many Test Takers who study in that way end up getting 'stuck' at a particular score level. Even the best books are limited in what they can teach you; they also can't force you to approach questions in a certain way and their explanations are often one-sided. There's no harm in starting off your studies in that fashion, but you'll likely end up needing to invest in some additional, non-book resources at some point.
Once you've taken that initial CAT/mock Score, you should post back here (or you can feel free to PM me directly) and we can discuss the results and how you might best proceed with your studies.
GMAT assassins aren't born, they're made,
Rich