Regarding this being the fastest time by an Indian, I find it hard to believe that Karthik (Puthraya) hasn't beaten this time (although I guess it's possible). Karthik has a time of 1:53.68 on Cubemania; I seriously doubt that's his best time ever.
However, that being said, this is still pretty good, and especially so considering you've only been at it for 4 months! My best time was around 3 minutes after 4 months. Nice job!