JEE Advanced

The Joint Entrance Examination (Advanced) is an academic examination held annually in India for admission into IITs. According to the official website of JEE, candidates must simultaneously fulfil the following four criteria to appear for JEE (Advanced). Criterion 1: Performance in JEE (Main)
Candidates should be among the top 2,50,000 successful candidates (including all categories) in the JEE (Main). Criterion 2: Age limit
Candidates should not be less than 17 years old. Criterion 3: Number of attempts
A candidate can attempt JEE (Advanced) a maximum of two times in two consecutive years. Criterion 4: Appearance in the Class XII (or equivalent) examination
A candidate should have appeared for the Class XII (or equivalent) examination for the first time in either 2022 or 2023, with the subjects Physics, Chemistry, and Mathematics. Therefore, since you passed Class 12 in 2022, you are eligible for JEE Advance 2023.

There is another rank which is given, apart from CRL, called as JEE Advanced Preparatory Rank. For example, if your JEE Advanced Preparatory Rank is 150, then it will be written as 150-P. It is completely different from CRL and it has a different meaning also. Let's know more about it. The vacant seats reserved for SC, ST and PwD candidates will be allotted to the candidates of respective categories for admission to a preparatory course of one-year duration on the basis of relaxed admission criteria. Admission is given to the candidates in the preparatory course provided
The seats reserved for the respective category are vacant and Candidates have not accepted a seat in the preparatory course earlier.

If your category rank (OBC Rank) is 3032, then the IITs available to you are:-
1] IIT Dhanbad - Geophysics (5 Y)
2] IIT BHU - Bio (5 Y)
3] IIT Kharagpur - Applied Geology (5 Y)
Unless you need the IIT Tag to flaunt in front of your relatives and unless you have some specific interest in these fields or unless you are planning to work hard to get a vertical branch transfer, go for NITs on the basis of your Mains rank or go for a drop. If your Open Rank is 3032, then you have a lot to choose from: - (The best options in no specific order, according to me are chosen as there are 50 and more branches open)
1] IIT Delhi Chemical (Dual Degree)
2] IIT Bombay Civil Engineering
3] IIT Madras Aerospace
4] IIT BHU Electrical Engineering
5] IIT Jodhpur Artificial Intelligence
6] IIT Guwahati Mechanical
7] IIT Bombay Metallurgical
8] IIT Bhubaneswar CS (5 Y) CS from all the newest IITs
9] IIT Indore Electrical Engineering
10] IIT Delhi Production Engineering
But if I were you, I had pick IITM Aerospace
PS - Data based on JEE 2020.