Exam

It completely depends on your area of interests, competitive exam in which you appear and the main criteria is your Rank and Marks. If you have scored good in exams you will definetly deserve a seat in reputed college which has good infrastructure and faculties along with decent placements.So all t

If you are a graduate, you can directly do IPCC, otherwise, you need to go from CPT.

Check the below link of the college predictor, check for colleges based on the JEE Mains rank and category.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=8030745
Also, do check for state engineering colleges accepting JEE Main

It will be difficult to get NIT with this score. Also, look for state engineering colleges accepting JEE Mains score. You can check the below college predictor:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=8030745

You can look for state engineering colleges for mechanical engineering discipline. You can also check for government colleges OBC-NCL quota. This might help you.
Check the below link for top mechanical engineering colleges:
https://www.shiksha.com/b-tech/ranking/top-mechanical-engineering-colleges-in-

First of all, you have to appear for CAT examination and score good percentile in that and then perform well in GD-PI.

There is no need for paper 2. You can apply.