IT & Systems

This degree is awarded for completing a programme of study in the field of software development, software testing, software engineering, web design, databases, programming, and computer networking and computer systems.

You should have above 75 percentage, as you will get admission according to your JEE rank, so class 12th percentage does not much matter.
Good luck.

Try doing a specialised certification in IT based on one of the above mentioned interests in IT. Choose one. Do small projects with startup companies initially. Once you gain more knowledge on basics, take up an MBA IT or systems management or any other MBA stream that would be more relevant at that point of time.

Firstly, IT is an industry which encompasses the function of marketing too. So doing both as part of a job is not unheard or impossible task. You can choose a stream of MBA which inculcates IT or systems management in its course while specializing in marketing stream during your 2nd year of MBA. As per my knowledge WE School provides business MBA stream with marketing specialisation.

Scholar Rahul has already made your choice pretty evident. I would just like to add a few more pointers to the same. You can work with other freelance HR consultancy firms, to gain experience and there is no dearth for people who have set up HR consultancy on freelancing mode. Also, you can take up online HR teaching and / or training.

Hello,
Here is the list of few colleges fulfilling your needs:
Indian Institute of Science
Indian Institute of Technology, Bombay
Indian Institute of Technology, Delhi
Indian Institute of Technology, Kanpur
Indian Institute of Technology, Kharagpur
Indian Institute of Technology, Roorkee
Banaras Hindu University
Center for Distance Education, Aligarh Muslim University
Indian Institute of Technology Guwahati
Indian Institute of Technology