Engineering

Yes, you can if you have completed your intermediate with Maths, Physics, and Chemistry. 

Also, you can give some entrance exams for colleges.

Your, teacher notes and guidance are more than enough from any book .

Good to hear, study each and every chapter in good manner and give equal time and stay happy most important.

Follow pyq more and revise nothing more needed than it .

Some will mocks to be honest accurate mock are not provided by coaching they provide tough one so that student always prepare for the toughest . Due to which student score lesss in mocks and get depressed.

Yes, in IIIT Manipur easily after participating in CSAB round.

With 83 percentile in JEE Mains, admission to CSE in top NITs or IIITs is unlikely for General category. However, you may get lower GFTIs or North East NITs and CSE-related branches like IT, AI/DS, or ECE in newer IIITs or GFTIs through JoSAA/CSAB rounds.

Options depends upon you category and homestate, so complete your question. 

You JEE MAIN rank is too good . It guarantees you good seat in good college.

For IIT seat it will vary from category.

Appear in JEE main, score good percentile and participate in JOSSA AND CSAB counseling and get admission.

It varies from college to college, but to be honest average package is just a trap . But it still will be from 7-8 LPA .

I am again repeating it varies from college to college.

No, until you are from SC, ST category.

What are you asking .

Even if you were from General category you can get .

But as you are from SC category no one can stop you from getting a good seat in good college with good branch.