JEE Main

You can try the Shiksha's JEE Mains college Predictor. Link is given below:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6540165.

There will be no problems if you take. Drop for 2nd time but it will be like your last chance. You have to work hard.
Good Luck.

You might come across certain difficulties in dropping 2 years as with your age you won't be able to apply to some colleges. You should consider you age as a factor first and if you think you can do well by dropping twice you should go ahead with your plan.
good luck.

Yes, you can score a good rank and you can choose a better college.

It would be better if you choose B.Sc. And if engineering is your aim, then prepare for it while pursuing your B.Sc. Degree and give the exam again next year or otherwise, focus on B.Sc. And start preparing for post graduation exams in your second year of B.Sc.

Hello dear,
In this rank, there are rare chances for you getting admission in any of VIT campus but don't lose hope. You may take admission in private colleges on your state. Dear, believe in your skills and your knowledge by which you may get better placement and job opportunities, then a VIT or any IIT students. Thanks for connecting with Shiksha.com
Best wishes for your brighter career!

There is a chance for you to get a seat in Sastra but not CSE. Last year students with scores 989-988 got CSE
You may get ECE or EEE
Hope you will get a better seat.

Sorry for saying this, there is no chance for you to get a seat in SASTRA in stream 2 based on your rank. Last year, students who got even 984 marks didn't get the seat. Try for other universities.

There are chances to get this college in these marks but you have to wait for 2nd or 3rd counselling.