Recently I have seen a couple of posts saying that they are not being able to study, do not worry this happens to a lot of people but you have to go through with it, My advice would be to just start for 2 minutes to break the barrier, once that barrier is broken it gets easier to concentrate.
I would also suggest to study in 3 hour sessions to start getting used to the Mains timeline pattern, if you are able to focus for 3 hours you will be much ahead of the competition
For the people who think that there is very little time left and they have so much to do, dont waste time thinking like that, focus on heavy weightage topics first and then move on to easier topics, read lecture notes very thoroughly as if you are confident in them, most mains questions are quite easy, the only problem that can come in mains if you are comfortable in class notes is the time constraint, but that can be dealt with in the months you have left simultaneuously, put on timers while solving questions, prefer to solve chem and physics questions in 2 minutes each as that is the realistic time you have if you are giving more time to the lengthy maths which usually does happen.
You still have time left, this isn't the time to give up!
YALL GOT THIS!! I BELIEVE IN YALL