Hi Sankha Subhra Mondal. Thanks for contacting Careers360 and we hope we will be able to answer your query.

I hope that you would follow this advice from your big brother, your senior that:

• You are going to have to work really really hard for the next 365 days.

• Divide the subject topics among different days and start following it.

• Study qualitatively.

• Remove all sources of distractions and start working.

• Take breaks and study with full concentration.

• Use e-learning tutorials for better preparation.

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I would also like you to refer to these links for more appropriate guidance:

• https://www.quora.com/IIT-Preparation-from-class-12-CBSE-possible
• https://www.quora.com/How-can-I-prepare-for-my-12th-class-board-as-well-as-IIT
• https://engineering.careers360.com/articles/how-prepare-for-jee-main-and-class-12th-board-exams

Hope this helps you and all the best!