Exam

If you JEE Mains rank is 47000 in OBC then you get cannot the best IIT even if your CRL rank is 65000, you can't also get into NIT. I am not demotivating you but I have 2 to 3 suggestions for you,
1. Take drop and aim for IIT Bombay and it is achievable if you don't repeat your mistakes. (I will prefer join any online coaching)
2. Go for state level CET exams and go for state level best college.
3. Some private colleges such as Lovely Professional University and etc. accepts low score of JEE Mains also, it is a good option. Go for JAC counselling, state counselling accepting JEE Mains score. I am from Maharashtra, but I know that this year UPSC was cancelled and getting colleges on the basis of JEE Mains.
4. If you have enough time and preparation, go for JEE Advanced and go for lower IIT, if you are able to get lower rank.

First of all, congratulations on your results. The National Testing Agency NTA conducts the JEE exam for admission to premium IIITs and NITs. Recently, it has released the JEE Main Cutoff for 2022, and usually this cutoff is of two types: the qualifying cutoff and the admission cutoff. The admission cutoff for JEE Main will be the opening and closing ranks for each institute and will be released by JoSAA (joint seat allocation authority). Based on the information you have given, you have a chance to get admission into select NITs like the National Institute of Technology (NIT) in Rourkela, the National Institute of Technology (NIT) in Arunachal Pradesh, and the NIT in Mizoram. However, it would also depend on the course you wish to enroll in. Like at NIT Rourkela, the cut-off for B.Tech. In food process engineering was around 45,000 in 2021. You can also use the Shiksha platform's JEE Main College Predictor 2022 (https://www.shiksha.com/engineering/jee-main-college-predictor) to get more specific recommendations based on courses, fees, and rank. Here you need to enter your JEE rank or percentile, gender, category, and domicile to get recommendations of possible good colleges.