Right now time is less, so there may be a lot of topics that you left or in which you are weak.
Now what do you do in this last month for such topics.
The reality is that you can't master topics like conics or fluids or inorganic in one month. By master, I mean if in the paper, a tricky question comes from such topics, you wont be able to do it. Why? Because you haven't practiced it enough and one month cant change that.
But from experience I can tell that these tricky questions are not majority of the paper. In fact these are in the minority.
So I would suggest cover all the basics of these topics. Understand every sentence. No one is telling you to solve level 5 problems from such topics. Just go through them. And then try solving basic questions(Level 1 types). Grow your confidence. Watch online videos of topics. Start from basics.
The point being that the paper consists of many direct questions. But you dont know where or in which topics these direct questions come. So cover the bases of each chapter. If I give you eccentricity and length of major axis, you must know how to find length of minor axie, or latus rectum, or how to graph them.
For inorganic, just read ncert. Understand every line. You must feel its ratta or you have to mug up, but its not true. Just go through line to line, you will find many connections of concepts and reactions.
These are somethings that I learnt through JEE. But you have to decide what your plan is for the next month. Everyone is different. Never listen to toppers. They dont know whats in your hear a month before an exam like JEE when you have weak concepts in topics.
I tell this to anyone who wants motivation, personally, college life is chill. You can get 8.5 cgpa even if you enjoy most of the time of your year(cgpa depends from college to college, Im speaking from NIT Warangal's perspective). The only thing you regret is the feeling that you could have done more, much more in those JEE days.
So work hard.. get through this journey.. you will taste the sweetest of succeses that you can ever imagine and it will live on for the next 4 years and the rest of your life.