How to study properly? What are its basics? And How to get full attention?

For a CBSE student, attention to details would prove helpful. If you are a political science student, keeping up with news and current affairs will be the icing on the cake. To score marks, always add a paragraph of introduction and conclusion to long answers and write in bullet points, highlighting keywords.

First think about your motive to study if you will not start the study, then what happens after one year because you cannot reverse the time. No magic will happen if we don't care for the time; we fail or get bad marks, and if you are not ok with this result, get up and start. There is no shortcut of success; if you want to get it right away, it is my personal experience.
Just make a timetable for you and try to stick to it for one month then you will be habitual. It isn't easy in starting, but you will enjoy it after some time. Fix hours for study and promise to yourself to first complete your tasks before enjoying your day. Also, you can take a small gap while studying.

Dear Kajal,
First of all, you should never distress yourself thinking about your inefficiency and lack of concentration during studies. No one can get a cent per cent concentration while studying. It instead becomes distressful when you force yourself to learn. Instead, you should calm your mind and get the best of your mood to think clearly and better understand the concepts.
A well-disciplined study plan and timetable has to be made. Set goals everyday attainable by you, rather than keeping impossible goals which only further demotivate you and will end up devastated. It is always essential to make the concepts clearer to you rather than rushing through topics.
I would recommend you to spend daily at least 15 mins doing yoga which undoubtedly will improve your concentration to its peaks. It would help if you also spent time introspecting where you are slacking and sorting out problems that distract you.
Class 11th and 12th provide the necessary foundation for the courses you wish to master in the future. It is essential to give your best effort to embrace the concepts and better understand the course every time you go through it.

First of all, you must believe that you can cover your topics, and make a rough calculation of the subject.

After that, you can start with the most challenging one because you may get bored as the day passes.

To overcome the boredom, you can do your favourite activity like gardening, listening to music, dancing; refresh yourself and keep going.

Most importantly, it would help if you didn't stress yourself, and learn with a free mind.

Hi Kajal,
First of all, study improves your knowledge and makes you different from others because a knowledgeable person never defeats. Make your study as your passion. Study good material always entire life helps you as a person and a good human being. So focus on your studies, they are best friends of your for your whole lifetime. Be happy and study well.