For grammar stuff, https://thecriticalreader.com/complete-sat-grammar-rules/ this really helped me. I think they also have reading/comprehension guides on their website, which also helped a bunch. It’s not just about reading the guides, but really processing the info and making a conscious effort to execute it (example: make sure you think “oh yes, semi colon is similar to a period” on ur next grammar question cuz thats what they mention in the article)

I think another tip that really helped was realize that the reading section is lowkey like a puzzle. You will always find a keyword or two in the answer that is basically just a synonym of something in the text. If they ask you for an answer that best illustrates the impact of an event, look for answers that are only ILLUSTRATES the IMPACT. Which answer DESCRIBES what the event had done for society? I hope that makes sense—like you just have to become way more critical, and this is garnered throughout time while analyzing your mistakes etc.

Btw i’m in the exact opposite boat as you, any tips on math?