CBSE 12th

If your believe your passionated about sports you can do your B.Ed in Physical Education. It also may help you to choose the right field your passionated about. If your working and confused about how the quality education will work out for you,you can go for distance B.ed and after completion you can apply for jobs desirably.

The best government colleges are NIT's, IIIT's, GFTI's, etc.
The best private are BITS, THAPAR, VITEEE, LNMIIT, etc.

If you are interested in doing B.Tech then, of course, it is good.

Hi,
Studies are important but not the guaranteed way of making good into your career. Identify your strengths, personality, interests and resources and think of a start up or innovative idea to work upon. You may also go for vocational course of your interest like tourism, hospitality etc. to enhance your skills first.

Hi Rahul,
You can consider subjects like biotechnology, bioengineering, biomedical engineering, genetic engineering, forensic sciences, etc. but will depend on your interest.

Hi Sanya,
Yes, you can take the TOEFL during 12th, there is no eligibility for it.

Hi Muskan,
The syllabus will differ from subject to subject and also with colleges. You should know what to study and browse through college websites and check the same.

Hi Dakshata, it varies from college to college. Majority of them requires 50% on a minimum. Additionally, you must take NATA entrance exam or any other college entrance to be considered for admissions.

Hi Deepender,
It's difficult to specify college names since they will announce their respective merit list and you will have to see where you are eligible. With 82%, it will be very competitive to get DU colleges however private colleges can be considered. You may check here for options:
https://www.shiksha.com/humanities-social-sciences/colleges/b-sc-colleges-india