Vipassana beginners program is of 10 days, mostly meditation and no talk at all. No contact with outside world etc. There is also one institute in Dehradun. I am not sure how worth it is for you as everyone has their own reason.
I've done the same course in igatpuri
same is also available in the Pagoda near essel world.( it has AC)
beginner course is for 10 days, where you're not supposed to speak at all.
it's an awesome experience!
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