Engineering Entrance Exam

CET of respective states will do fine.

Yes, you can, but you have to get into premier colleges like good NITs, DTU, NSIT and IIIT, otherwise it may create problems if you join a local college.

It will be hard to get any state government college as even the counselling of many colleges is about to end and the sessions will probably start from mid of August. But, you can still look for it in your area. But, the best option will be to join any private college because your board percentage an

This actually depends on whether you are comfortable with coaching or not. Because, there are many students taking coaching and getting good marks but there are also many students who opt self-study rather than joining the coaching. So, it depends upon your level of preparation and confidence.

For OBC category, 180+ would be safe for CS branch. Also, it depends on your state, whether state quota or all India quota. But, top NITs are NIT Warangal, Surathkal, Srinaga and Durgapur.
All the best.

There will be no effect on your placement but at least you will do much hard work to get next year and achieve better rank than this year.

First, complete the NCERT book then study the coaching material. Test series comes in last.

Visit the website jeemain.nic.in for the same.

Sorry to say but you are not eligible for any of the government colleges including NITs, GFTIs based on your marks.