How do i go from almost knowing nothing in inorganic to being able to solve almost everything

For context I get about 40-50 in chem only through organic, physical, coordination compounds and chemical bonding along with d block. There's just some questions that i have no clue about and it makes me worry about how volatile my chemistry is. If I get lucky and the paper is majorly organic and the chapters stated above, I can get 70+but I don't want luck to play a factor the day of the exam. Please don't say ncert i don't think I have enough time