i am a btec cse student thinking about preparing iit jam maths help

how is the msc maths program in iit delhi? How many people get jobs? Phd abroad? The culture? Also how do i start preparing on my own for iit jam maths? i know the syllabus is on the internet but usually the syllabus released officially just gives broad topics and not detailed sub topics and the entirety of the syllabus. if someone could tell how to prepare id be very great full. like which books and study material to follow which chapters to do from which book. from where to solve questions.

thanks in advance for the responses