Hello there,

Hope you are doing well . See people can give you an idea based on own personal experiences . Rest you'll have to know what suits you best as your biological clock is different from others. Some people prefer to study during the day but some at night . As you mentioned you are a night owl ,I can give you a somewhat rough idea on what should be your routine . Rest ,you'll have to check if it's suitable for you .

As your coaching time is 10 am to 5 pm means you are devoting 7 hours to your coaching studies which indeed is a good deal of time in a day . So try to remain very  attentive in all the classes so that most of your studies are done in the coaching itself and most concepts and doubts are cleared there only . For that drink plenty of water and take small meals in the breaks . In this way you won't feel tired or sleepy .

Now coming back home devoting a maximum of 4 hours to studies according to me will suffice given that you did all your coaching classes well with full attention .

After coming back home ,freshen up,have a lite meal ,take some rest maybe a nap of an hour or 2 . For doing all off this it'll take atleast 3 hours and I'll be 8 or 8:30 pm already . From then on you can wake up ,have some tea or coffee and sit for studying from 8:30 to 9:30 pm. Aar 9:30 pm you can have your dinner and can sit for studying from 10 pm onwards . From then on you can study till 1 or 1:30 am . Up till now ,this time table is suitable for both early birds and night owls. Preferably you should revise all the stuff that has been taught to you in the coaching that day itself in this time period. This won't let things pile up and create a presure on you later on.

Now , after revision you can study till 3:30 or 4 am taking small 10 mins break after 45 mins or 1 hour of study regularly. In this time, you should practice questions and revise stuff that had been taught to you some time back and stuff which you tend to forget easily as you are night owl .

You can also include some refreshment time in the form of doing some exercise,watching movies at days you want to so that you don't get drained . Don't pressurize yourself too much and do remember to have some fun time .

I recommend atleast 6 hours of sleep to have a healthy and fresh mind ..So from 3:30 to 9 am you can have your sleep and then get ready to reach your coaching by 10 am . On holidays you can change your time of sleep and study accordingly.

Hope my answer helped. All the best !