Hello Manjulata

JEE Main 2019 Result for the January session has been released by NTA in online mode. The NTA scores are the normalised scores across multiple session papers and the scores indicate the percentgae of candidates that have scored equal to or below that percentile score in that session.

With your percentile score, you may predict your rank. Prediction of the actual rank would be difficult as JEE Main exam is being conducted twice for the first time.
You expected rank will be around 512,761 - 577,761. This is the predicted rank and it should be noted that  the Overall Rank Predicted is on the basis of the expected total number of students i.e. 1150000 appearing in the JEE Main April Session.

With this, chances are less for admission to any decent Engineering college. You should appear for the April exam as well.

Good Luck!