Kousic, I believe you mean NTA score and you are asking for the JEE Mains exam. If not, please mention the exam's name in the comments section.

Now your expected JEE Mains rank can be calculated using the formula:

(100-your total percentile) x 869010/100

So with 57 percentile, your rank in the CRL or Common Rank List would be around 373674.

Also, if the number of students increases to 12 lakh in the April session, the formula for rank calculation would change to:

(100-your total percentile) x 1200000/100

Hence your expected rank in CRL in this case would be around 516000. We cannot exactly predict your category wise rank.

While it is difficult to predict the exact qualifying cutoff, a percentile of 85 or above is decent enough to qualify for JEE Advanced for the unreserved students. In 2019, the NTA score cutoff for the Common Rank List was 89.7548849 and for the OBC-NCL category, it was 74.3166557

According to your percentile, it will be difficult to clear the cutoffs for JEE Advanced. Also you might not be able to get a seat in the top NITs or IIITs with this rank. I would suggest you to sit for the April session and give your best in that exam so that your chance of qualifying JEE Mains and getting a top college increases. Solve the previous years' papers, brush up your concepts and revise thoroughly.

You can also go through our college predictor to check which colleges you are eligible for through your JEE Mains score. The link for the college predictor is:

All the best.