for the general category students, the minimum marks required are: For IISER Pune, the safe score will be 110+/180. For IISER (Others), the safe score will be 70+/180. However as you belong to OBC category , your chances of getting a seat in good IISER is very low as because the cutoff goes quite high. Rather you may also try for the later rounds of counselling if possible however the chances are very low. Hoping for the best. For more information refer to

https://engineering.careers360.com/articles/iiser-admission