I would suggest you to prepare the time table as per your convenience as you know better about your day schedule.

Here is a time schedule you can also prefer & accordingly can prepare.

Wake up early, preferably at 5 am in the morning so that you get at least 2-3 hours to study before you go to your school. The early morning hours are considered best for learning.

The school timings for mostly are 8 am to 1.30 pm. It is advised to relax for some time after you return from your school.
if you have joined any coaching then Sit for 2-3 more hours after coming back from your coaching class. During these few hours, squeeze in some time to revise all that you did in the coaching class so as to memorize it better.
It is suggested to take a 5-10 minutes break after every hour to unwind. This helps you focus better.
Lastly, do not compromise on your sleep. If you are to wake up at 5 am in the morning then the ideal time to go to bed is 10 pm.

Good Luck!