India

Only BCA is not the best option to enlarge your career. For a successful career, you need to do Master after BCA. You can also do other short courses, like software testing, web development etc. Only BCA or MCA isn't appropriate Degree for you unless you have extra skills.
I have Completed BCA, and now I am successfully working as inbound marketer, SEO, Content Writer etc.

https://www.shiksha.com/medicine-health-sciences/pharmacy/colleges/b-pharma-colleges-Delhi-ncr
Kindly visit this link.

Kindly visit this link:
https://www.shiksha.com/b-tech/colleges/b-tech-in-biotechnology-engineering-colleges-Maharashtra
https://www.shiksha.com/b-tech/colleges/b-tech-in-biotechnology-engineering-colleges-Karnataka

Kindly visit this link:
https://www.shiksha.com/b-tech/ranking/top-engineering-colleges-in-Delhi/ncr/44-2-0-10223-0

Check the below link for engineering colleges in Delhi-NCR. You can get the brochure for the respective colleges. You will get the fee, ranking, courses offered, and student reviews.
https://www.shiksha.com/engineering/colleges/colleges-delhi-ncr

Kindly visit this link:
https://www.shiksha.com/b-tech/resources/ts-eamcet-college-predictor

First of all, congratulations on clearing JEE Mains and among these low ranked NITs, I would recommend Sikkim followed by Srinagar, Manipur, Nagaland and Meghalaya.

Some of the top CAT coaching institutes are:
Alchemist Institute
TIME Institute
Mindworkzz
Career LauncherAnkGanit
IMS Institute
Tathagat Institute
This article might help:
https://www.google.co.in/amp/s/www.shiksha.com/mba/articles/amp/top-10-coaching-institutes-in-india-for-mba-entrance-preparation-blogId-11477