Dear aspirant,

As you didn't mentioned your category which is a determining factor for getting a seat in any of NIT's, IIIT's or GIFT's.

Taking as a general candidate, nowadays it's seems almost impossible for a 73 percentile student to get into any premier Institute in India through JOSAA counselling.

You may prepare for another attempt or can take admission in some of the private institutions in India.

For preparation tips you can follow the link given below,

https://engineering.careers360.com/articles/how-prepare-for-jee-main

You can also use the JEE Main College predictor tool given below to know your other admission possibilities with the possible branches.

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you..

Best of luck..