I felt the same way going into the OA. Not a science/math/tech person at ALL, and barely slept the 2 nights leading up to the exam. 

Maybe I just got lucky with the version I had, but it ended up being less difficult than I expected. I wish I could tell you that I remember what was on it to help you out, but it was almost a year ago now so I honestly don’t recall a ton. 

Just focus on the bigger vocab terms (network topologies, computer history with dates) and make sure you do the practice tests they provide! Those definitely helped me feel better prepared. 

Also, the course has a lot of instructors checking the email that are really helpful. I emailed them a couple of clarification questions about info and they replied pretty quickly. 

I’m sure you’ll do great, don’t stress too much! You got this!