Hello

Your NMAT score of 189 is decent, but it is usually around a 40–45 percentile range, not among the very high percentiles.
With this score, top colleges like NMIMS' main campuses may be difficult, but you still have good options in private universities.
You can realistically target colleges like OP Jindal, Amity, ITM, Bennett, VIT, and similar schools that accept scores in this band.
If you really want a higher-ranked B-school, you can think about one more attempt next year and aim for 220+.
Since you already have an offer from OP Jindal (off-campus Delhi), it’s a safe and reasonable option if you want to start now.

Hope it helps you