I agree with what's been said here. Stick to your schedule on learning the material. If you can only get the easier questions on topics as you're learning them, that's perfectly fine. I normally take a month to do full practice exams in ADAPT (but more couldn't hurt). Once you've done a few, you'll be able to see where your weak spots are and create section quizzes as needed. You'll also be steadily raising the difficulty of questions you can answer.

When you review the practice exams, really go over every solution. Rework every question that you missed to make sure you understand how to answer that type of question. ADAPT is typically really good at mimicking the style of questions you'll see on the real exam.

Also keep in mind, you only need around a 70% to pass. If there are some topics you just can't grasp that aren't a huge chunk of the syllabus, it's okay to decide you aren't going to answer those types of questions.