I am assuming that you are from home state so as per the latest cutoff trends to get iiest shibpur you need about 53k rank for general female candidate so that amounts to a percentile greater than 94.8 percentile that will fetch you a rank which can just make you enter iiest shibpur also since you have mentioned that you are a ews candidate so consider a bit more relaxation but target yourself to get atleast 95%ile so that you can atleast enter iiest shibpur and for getting better branches you need to score higher percentile also you an predict your college using this link

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer