This far out, I suggest just reading more. Philosophical essays, humanities essays, college level text, etc. Learn how to quickly extract main ideas. For CARS, people who grew up reading a lot tend to score much higher than those who did not so working on those reading/comprehension skills is crucial. Unfortunately, being ESL, you are at a disadvantage but 2 years is definitely enough time to refine your ability to read and process dense information quickly and effectively!
Also, I don't think you should be using CARS prep material this early as those should be used for practice when you are actually taking your MCAT. IMO but you do you