Hi Harsh,
To become a registered Architect you will need to study Architecture School and earn a Bachelors in Architecture which is a 5-year Program.
Doing the shortcut will only make you a draftsman, for which I highly recommend taking an AutoCAD LT Class and join any firm.
I do recommend taking up some Interior Design workshops and start working with some designers. This way in time, you will have your name established, and you will not have to survive the torturous becoming-an-Architect journey.
It is better you focus on your 12th as of now and then take up the 5-year program for a better career.
Good Luck!
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