With the score of 69 out of 300, you can expect your percentile to be 90.2-90.5. With this percentile, your predicted rank would be around 87000-105000. Since you are in OBC category, your Category rank would be around 24000-29000.

At this rank, you will be qualified for JEE Advanced.

But there are very very less chances of getting into NIT based on this score. However you can choose to apply for JEE Main (April) and improve your score or to get admission in other colleges (State government, private, etc.).