system
A chat on subreddit /r/wallstreetbets
human
Kaplan books, Khan academy, and enough NextStep test that I want to kill myself.

gpt
You should be good then. I used NextStep books and whatever practice exams I could get my hands on. Had on off test day cause they didn't let me smoke cigs but still managed a 508.  
  
 Be wary of burning out, though. Take a day off or two before the exam, let your brain rest. I did that for STEP and it definitely helped.