Maharashtra

Hi,
CS is a nation wide course and anyone registered with the Institute if company secretaries of India can pursue the course.
It's not a course depending on city or your location or anything like that.
The only thing I believe can bother you once you start studying is the coaching facility available at the place where you are, that is if you decide to take coaching classes for the same.
Else your location, be it anywhere is irrelevant.
All the best!

I think mechanical engineering from Heritage Institute of Technology is a better option but marine engineering takes long. If you go for marine engineering, you go through a long process like interviews, medical checkups. After doing your B.Tech from Heritage, I think you should have to prepare for GATE for M.Tech or you do one more thing which is to start your GATE coaching in the very 1st-semester to last. After doing 4- years of preparation, you will get IIT for M.Tech easily.

You can try because there is some percentage reserved for the other state students so, probably, you will get admission. I think you must try.