How should I study in 9th?

Aim dream and work hard should be the slogan and vision of students maths is not just confined to just reading you should solve the unsolved problems 10-15 times and do breathing exercises and meditation to stimulate dopamine and use intelligence to analyse maths physics chemistry biotechnology biochemistry problems and don't waste time as time is very precious and answer chemistry physics biology and other subjects precisely to manage the time as well 

For mathematics, take a sheet of paper and write  4-5 different types of questions from each chapter. After that try to solve that very sheet daily, in this way your concept will become strong and you won't find difficulty in solving any questions.

This is the method that I followed till class 12  CBSE and scored 95 marks in mathematics.

For any other subjects like science and social science try to solve the exercise and revise it multiple times, this will let you score at least 80 makes out of 100. All the best. 

Dear Pravin

Don't be panic or stressed

Take very good care of yourself

Have a good time table or atleast make a habit of completing reading and understanding the topic taught in school on the same day

Keep weekends for revision 

Take good 6-8 hrs sleep

And don't get indulged into video games or any other game on electronic devices.

Better you fix time to go for any outdoor games. This will sharpen your mind and help you to focus more.

Once you understand concept keep revising it. There are availability of many test series topic wise. Subscribe or take help from them

9th grade is concept building stage therefore be focused

Eat healthy, drink lot of water, don't be stressed or tensed

Always remember you are precious for your family

Don't overburdenise yourself

One simple but consistent step will fetch you your goal

Best of luck dear