About weak topics

I am scoring about 567 in neet 2023. This was my first attempt. I aim to score 660 plus but i want to know how is it possible to efficiently manage 11th and 12th syllabus at the same time. I have planned to complete the syllabus by the end of September or mid october. Want to know if its achieveable. As everyone around me is saying its almost impossible to increase marks in a year but i see this as my last attempt and i am very much dying for it. Also i am very weak at organic chemistry rotational motion, capacitor and resistors combination in physics . Please guide me how to become expert at it