If you want to take admission in government colleges you can apply for DTU and NSIT it consider JEE Main marks to provide admission and counselling is held through JAC Delhi. To be eligible you must have 60% aggregate marks or more in Physics, Chemistry and Mathematics in your 12th class. There is relaxation of marks for reserved category.

Through JEE Main you can also take admission in private colleges of various states.

To check the list of private colleges you can refer below link

https://engineering.careers360.com/colleges/ranking/top-private-engineering-colleges-in-India-accepting-jee-main-score

You should also appear in your state level entrance exam to take admission in government colleges.

Good Luck!!