So, I'm coming from an undergrad and career in engineering, so the QR was kind of my thing. Too bad it's the one that "doesn't matter..."
Anyway, for me, one of the keys to the QR was to find patterns in the problems. Just like the PAT only has 6 sections (keyhole, angle ranking 😡, hole punching, etc.), the QR section only asks about 6 or 7 "types" of problems. Things like rates, probabilities, log functions, etc.
Use the study material (I used Bootcamp and Chad's) to learn to recognize and categorize each type of problem. Then, once you recognize the problem type, have a prescribed method at the ready to implement setting the problem up and at least start working towards a solution.
Example: As soon as I see a problem saying "Worker A mows 3 lawns per hour and Worker B mows 4 lawns per 90 minutes" I immediately know it's a rate addition problem and I set up the problem to add up combined lawns/hour.
Or if it says "A password is made with 3 letters, then 2 numbers which cannot repeat" I know it's a probability and I start setting up probability fractions.
Or, once I see two overlapping shapes, I start looking at any method I can use to calculate the area of each.
The biggest challenge for the QR is the time limit. So training yourself with ready-to-deploy methods helps a ton. I know this flies in the face of reason, but lot's of time I couldn't "see" how to get the answer, but as I'm using a pre-determined method to set the problem up, the path to the answer becomes apparent. All that being said, there were still some that I guessed on and didn't have time to review. If I couldn't immediately see how to set the problem up, I guessed and moved on.
Last thing: I would recommend NOT using the practice tests until you have a better understanding of how to set up and solve the problems. The practice tests are an invaluable tool to gauge where you sit. Once I took a practice test, if I tried to take it again I could remember the answers and the nuances to setting the problem up; things that you need to be able to do, not have memorized.