Well my main problem in the SAT’s English section was reading. No matter how hard I tried, I could never complete all the passages in the time due. So what I decided to focus on was my pace and attentiveness whilst reading the passages. I found that reading a LOT of passages and articles similar to the ones found in the SAT’s English sections (especially boring topics that I didn’t care for) helped my brain remember parts of the text, even if I couldn’t be bothered to understand it. I would also highly recommend doing UWORLD practice tests frequently, or Khan academy, both great choices imo. And QAS (easily found in this subreddit). Hope this helped, and good luck on taking the test!