During the lockdown nothing has been crisp clear so how should you practice from now(I.e .Nov- Feb to score 90 above?

Studies depends on the student. If really student is serious about studies then lockdown will not affect his or her studies.

Again student can use online platform for studies like askiiTians,unacademy,vedantu etc.He should make use of time rather than wasting the time.He should also apply for online test series which he get from askiitianns platform or other websites