Hey Ayush Kumar,

If you think that you are able to spend one more year for JEE Mains/Advance preparation then you can drop! Or else use the below tools and  estimate your college and choose from them the best one!

First you can go to the following link to estimate you rank by your marks! 

Below is the rank predictor tool,

Https://engineering.careers360.com/jee-main-rank-predictor

After getting your rank you can estimate your college by the rank! 

You can estimate the college by the college predictor tool.

Below is the predictor tool to estimate  which college you will get,

Https://engineering.careers360.com/jee-main-college-predictor

All the best!

You can get good private college in other states like: Haryana, UP, West Bengal, Punjab, Rajasthan, Maharashtra. Most of the states have reservation for other state students in private colleges based on JEE Main score/rank. You need to apply separately for them.

If you are determined to take admission in NITs or IITs only then you can take a drop.

All the Best!!