Hey Kristina!
A solid 600 by the middle of July is 100% achievable, but here's what you need to know: quantity of study does NOT equal quality. As mentioned, your plan seems very focused on simply completing books. The GMAT is way more than that. It's a three-headed beast: content, strategy, pacing. Your books will only give you the 1st one. And you can't learn all the content at once.
There's a lot of people who answer hundreds (if not thousands) of questions and their score doesn't move an inch. Let's be sure you're not one of those!
Here's what you REALLY need to do to improve your score quickly:
- Go concept by concept. Attached you'll find everything that is tested on the GMAT. Print it out. Select a limited number of concepts each week, and MASTER them. For example, think how much improvement you could get if you only did Inequalities, RC: Main Idea, and SC: Pronouns for 5 days? You'd be an expert at those three!
- REVIEW (and take regular CATs). Not only should you read the incorrect explanations, but you need to use an Error Log to thoroughly analyze WHY you're getting questions wrong. See the attached template. I would schedule 1 CAT a week and use the Error Log for that CAT to decide which concepts you want to hone in on for the next week. Don't bite off more than you can chew!
- Develop clear, solid strategies. You need to figure out how you're going to effectively use your scratch pad, so develop a systematic approach for each of the main 5 (non IR) question-types. Attached you can see the ones I use. If they work for you, great! If not, find ones that do!
If you decide you want to work with a tutor, feel free to scope out my free blog:
https://gmatrockstar.com/blog/. If you're interested in my approach, I'd be happy to work with you on setting up your plan and implementing killer strategies.
Best,
Vivian