JEE Main

If you fall under general category, then it is tough, but for other categories you might stand a chance.

Just the moment, you start thinking over the exam you preparations planning of exam has started. It needs constant attention and effort from class 11th to class 12th, but if you seriously look it into your last 6 months to 10 months preparation are more vital, as the time you study is you want to capitulate more and your complete target is for clearing the exams. So, hope you clear it with flying ranks.

You can check the colleges you may get from this below-given link-
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

It's not about college but it's about the field in which you are interested. Talking about college wise, go for NIT Warangal.

Yes, it is a good branch. But opt for metallurgy only if you are interested in this field.

You can check your college.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

I think so, if you want to devote one more year for JEE, then only. If you have a strong will power, then only try for it. Otherwise, it will waste your prestigious 2 years and you will have a regret of lifetime. Please let me know how are your studies going on? Are you not able to study well or unable to concentrate? Have you registered for any coaching institute droppers batch. Then, I may help you in letting know of how to get you through the exams and out of wits.

Hi buddy,
You can use this link to find out opening and closing ranks of IIIT Delhi:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6375912
Hope this helps. All the best.

NCERT books are the best to prepare for such competitive exams. Prepare your 11th & 12th syllabus thoroughly from your books. You can solve the previous years' question papers and sample papers also.