Dear applicant, the first thing you can do is not to panick, I know it is very difficult to manage school and NEET preparation at the same time. So first make a schedule that you will be going to school on some specific days when you have important classes rest you will stay at home and study hard. During the weekend try to utilise the time as much as possible, don't stress but enjoy the parts that you study. Practice more and sleep tight, eat healthy or you would loose energy. You still have time, do proper time management and use your skills to get the best knowledge out of it.

Good luck!!