For JEE in January if I have to start now.
Just study N.C.E.R.T. for complete revision of jee mains.
And then you may again solve the modules given to you or your practice material. @Shourya_Kumar
Thank you. But should I not revise material related to Advance now itself so that later I can give full test and there is much less to do then?
There is not much time left so you should just concentrate of revising the basic concepts and they will make you achieve your goal.