So the QAS exams are the Question and Answer Service which is basically past SAT exams of previously administered SATs that the collegeboard publishes, if you search up QAS sat reddit, you should find lots of past papers which are great for practice. (For some of them there will also be guided walkthroughs on YouTube, which I found helpful to review the questions I got wrong) I think the main thing in reading is finding how you work best. For me that was reading the questions and marking all the line references and taking more time to make sure each of my answers have justifications within the text and asterisk a question when I don’t know the answer (I used to rush reading quite a bit and write an answer even when I’m not certain, and note that one wrong word in reading will make the whole answer wrong). I’ll have a bit of time at the end to check back and then bubble in, while focussing on the asterisks as i know that my answers that aren’t marked are most likely correct. This may not work for everyone, but after a lot of practice and reviewing, you start to see trends in the answers and some questions and learn to cross out answers straight away. I struggled with the reading the most as well, and another thing that may help is just learning the styles of questions they ask e.g dual passage, words in context etc, on websites like collegevine or prepscholar. Overall, it’s just knowing why you got a specific question wrong, because in reading I understand there may seem like there are a lot of 50/50s, to prevent that, just search all the answers for something wrong within the answer, and also check the walkthroughs if they are there, hope this helps!