IIIT

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.

The National Testing Agency NTA conducts the Joint Entrance Examination JEE Main to shortlist candidates for admission into premier institutes like NITs, IIITs, and other government-funded technical institutes (GFTIs). The JEE Main Cutoff 2022 was released recently, 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 the Joint Seat Allocation Authority, which also takes into consideration your category. Now, according to the information provided by you, you might have a chance to get admission into the National Institute of Technology, Mizoram, and the International Institute of Information Technology (IIIT), Bhubaneswar, for B.Tech in Computer and Science Engineering. If you want to do B.Tech in Mechanical Engineering, you may get admission into the Dr. B. R. Ambedkar National Institute of Technology (NIT) Jalandhar and the National Institute of Technology (NIT) Raipur. You may also use the Shiksha platform's JEE Main College Predictor 2022 (https://www.shiksha.com/engineering/jee-main-college-predictor) to get more recommendations. Here you need to enter your JEE rank or percentile, gender, category, and domicile to get recommendations of all possible good colleges.