JEE

Hello,
I hope you are doing well. If you qualified and cleared the cut-off of JEE Mains in your category, then you should not take the drop because this will waste your time and you will suppose to start from scratch. Try to go for counselling and apply for government college, if you will not able to get the government college then go for some good private college but I suggest you not to drop until and unless you lose an opportunity by few marks to get an IIT.
All the best.

You are likely to get NIT, but with average rank, LMNIIT with a decent branch, though don't go with NIT less than 15th position among them. Moreover, shortlist the colleges according to their last year cutoff.

It will be somewhat difficult for you to get CSE with this rank, but yes you can easily get ECE with this rank without any hesitation.

Your rank should be 20k.

Coaching does nothing, it is only for the problems that you come across and can't be able to solve it by your own. Self-study is the best study and no one can beat that the only thing required for the JEE is smart work rather than hard work and for that only coaching institutes charge so much of fees.

No, because NATA scores are not excepted by most of the best colleges, they are only on basis of B.Arch, even some of state colleges not excepting NATA scores.

Solve previous years question, but without using answers keys. If you crack all of them, then your concept is good.

https://www.google.com/amp/s/www.shiksha.com/b-tech/articles/amp/jee-main-and-advanced-2016-prep-important-books-topics-blogId-11621
This link will help you to the best.

You have to believe in yourself that you utilize the one year properly for the preparation of JEE main. If you do not focus on your studies and concentrate, then your one year will going to be waste. Just work hard. Study strictly, practice more and more. Solve NCERT question and practice previous year question paper too. For any other query, please feel free to ask me.
Best of luck.

Hello,
Please use Shiksha college predictor
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.