[18F] plz guys help me in maths 😭

Hello, I am an 18-year-old female. I need a good one-shot resource for Class 12 CBSE Mathematics because I'm struggling with the subject. My preparation for the JEE has also been negatively affected. I studied Physics and Chemistry using one-shot resources and I'm expecting a score of 65+ in both subjects. To qualify for some colleges, I need to secure at least 90 percent in my board exams, and I'm feeling very anxious about this. 😭 Please help me; I really want to get 80/80 in Mathematics!