Hello Bhimanna Bhima,

You have to concentrate and be very dedicated if you want to achieve your goals for JEE. You can't take risks by postponing your study schedule. You have to study everyday and be up to date. 

Prepare a schedule for yourself that you have to follow no matter what. The schedule should be in a way that you give more time for your weak points. You will know that once you start preparing properly. You probably have things that are distracting you from your studies. Make sure you try to get rid of the distractions. You can't manage to get distracted. Just concentrate and study and prepare well for your goals and then you will realize or else you will definitely regret for not studying.

First know what is stopping you from studying and try and overcome it. It is you who can put yourself to study and no one else can do that. You should realize. Everything others can do is to tell you what can help or give you lectures or just tell you about life or motivate you but the main thing is in you.

All the best and think of your future. It is you that has to build it.

Your condition is very rare, I you should start reading and needs to show some interest in science subjects. You just enjoy studying science because it is very fun to enjoy the subject. When you will enjoy the subject your concepts will be more clear. Try to relate each topic to every possible living things it will be easier to remember.

Hope this may help you!