AME would not lead you towards M. Sc and Ph. D in Space sciences. Instead it would open up opportunities in the airline industry, which is currently doing well. Your academic record is not an indicator of potential for an academically demanding career such as space sciences. However, if you want to make the right moves, aim for B. Sc Physics and then M. Sc and Ph. D. Employment in NASA is open only to American citizens, but you can join India’s Space Organization (ISRO) through the various openings it offers to engineers and scientists.