Information Technology

With this MHCET score you might not get admission in any of these colleges.
you can refer to the following link to predict your college on basis of your MHCET score.
https://www.shiksha.com/b-tech/resources/mhcet-college-predictor

Different universities have different criteria. Thus, some universities allow pursuing MCA after BBA if the student had studied Mathematics or Statistics or Business Maths or Business Statistics as one of the subjects in graduation or 10+2 level. So, I can recommend you some of the universities like Lovely Professional University, Christ University, JNU and University of Delhi which may allow you to pursue MCA if one of the given criteria is satisfied.

Kindly visit this link:
https://www.shiksha.com/it-software/networking-hardware-security-chp

INR 1.22 Lakhs for 3 years (full-time).
For more, information visit:
https://www.shiksha.com/college/marathwada-mitra-mandal-s-college-of-commerce-mmcc-deccan-pune-47140/courses/bca-bc

CSE is core software based course mostly programming
IT is related to component parts and bit easy than CSE
ECE is relation to micro electronic devices.

Yes, you can apply now the merit list will come out in the month of June ends.

It totally depends on you. What you want to do in future. If you have more interest in computer, then go for BCA.