JEE Preparation

See, there is no chance for you to get any NIT, if you want to do hard work on your studies and if you have enough confidence to clear next JEE then you should go for next JEE, otherwise, you can get any private college like SRM, VIT, BITS-Pilani, UPES, LPU or COMEDK exams.
Good luck.

I think CEH (Certified Ethical Hacker) certificate will help you in getting a job quicker.

Hello,
If you drop one year, you have to study the whole syllabus again.
As you have studied 2 years in coaching, I would suggest you not to join any coaching institute
All the best.

Kindly refer to the link mentioned below:
http://www.bestmal.com/best-books-iit-jee-chemistry/

193 is really a good achievement. You can get one of the top 10 NITs.

Yes, you can. Just stay calm, focused and motivated during studies. Go through NCERT to build basics. For physics, go through HC Verma, solve questions given. For chemistry, NCERT is sufficient but for organic, you may read OP Tandon. In addition to this, you also refer to JD LEE for inorganic. For maths, practice a lot after understanding concepts, for reference you may choose RD Sharma.
Solve questions a lot.Solve practice sets of Arihant Publication to gain confidence and speed. Also, solve last year's question papers.

Join IIT coaching and study at home, the school syllabus of class 11th and coaching will take care of IIT JEE syllabus, but you also have to take care that you will have to do some self-study. It does not completely depend on coaching.

It won't be a good decision to take one more drop for JEE. Its better to join a decent engineering college through your JEE Mains score. Because drop will affect you in your career in later stages if you are not able to clear JEE next time. So, in my view, you must join a engineering college this year.

You should devote minimum 6 hours daily for study. You should have to concentrate fully on your studies in that time period to secure a better future. There should be no day lap in your studies if you are studying less than 10 hours daily. You should have to manage your time in that way so that you should study an average of 8-10 hours. You have to increase your sitting day by day if you want to crack entrance exam in any field.

First solve NCERT books and then solve question banks.
Prepare physics from HC Verma and maths from RD Sharma if you want good control over these two subjects.
Good luck.