I am in 12th standard and I feel that my 11th is weak. How can I manage my time to clear the NEET and board?

See dear you can focus on your 11th basics 1st as they are key chapters for 12th I don’t know about bio but for chem and phy 11th is basics so after completing 11th basics you can focus on 12th part and also for boards I prepared in 1 months and got more than 95% so boards are chill you can do them within a month