hi !!

 its good that you are preparing for both the exams so try to give around 5-6 hours a day for preparations of medical or engineering , as both are almost same, difference is only of maths or biology subject , so for them study last years exam papers , books like rd sharma for maths and for bio study , ncert . for physics ,hc verma, ncert and errorless , and for chemistry study errorless, ncert, grb.

all the best