Obviously it will be hectic.. A good MTech/MS course is always hectic and that how it should be..
But that’s not because there is a lot of academic pressure (of course that’s there) but because it demands you to be proactive.. In many classes you will be sitting with your BTech peers & you need to compete with them to get a good marks.. they are incredibly talented people & mostly MTech students came from some state level colleges.. so to mitigate it you need to be more serious & responsible..
also by the time you are doing MTech/MS you will already start thinking about your family responsibilities..
So all these things cumulatively makes the course hectic..
but at the same time it will be exciting.. you will be learning new things, taught by best faculties of the country & get extremely intellectual peer group.. overall it’s going to be most memorable 2years of your life