I have been answering many such similar questions in which the first thing I ask is, “are you interested or not?”
Anything you do in life could fetch you a worthy output if you are interested in that particular stuff.
Coming to your question, I would just say that IITs are the most prestigious institutions in India and have proved to be the pioneer of excellence since their beginning, so undoubtedly they provide one of the best courses and quality.
Many would suggest you to go for abroad studies which is also a good decisions because foreign universities provide a good quality education too as those countries have a good source of resources.
Now the choice is all yours. I’m telling you on the basis of what I have heard from my seniors and cousins who pursued their Masters degree from the foreign universities as well as IITs and NITs.