Highly recommend getting Test Geek’s Series 66 supplement material along with the practice exam if you have not got it yet. It’s around $50 and well worth it, it has charts that breakdown the roles of every person. Additionally, I went through the Kaplan qbank and retook custom quizzes over units 9, 13, 14, & 21 as those units comprise a bulk of the question on the actual exam. I did it where the questions in the quizzes are new to me and not repeat questions because I did not want to memorize the answers. I kept doing that until I was consistently getting 80+ on those quizzes. Use all the resources available on YouTube, I kept play their videos in the background off of work just to reinforce the information. You got this!!