I am a 2nd Year Undergraduate student of IIT Kharagpur. How I should prepare for this exam within the two upcoming years of my life?

Being a 2nd-year student is too early to start preparing for UPSC CSE. You might tire yourself out and when the actual time comes to outperform, you might not have the energy left to cope. Here are some guidelines that might help you prepare for this exam well in advance.

• Know your CSE syllabus well
• Read NCERT books of History, Political Science, Geography, and Economics from classes 6-12. This will broaden your knowledge base and you will become well aware of economic policies which can be adopted in a particular social sector.
• Another great way is to start reading the newspaper on a daily basis. Keep yourself well acquainted with the happenings in your country in the economic and other sectors. Develop your own opinions on the various issues prevailing in society. 

However, just reading NCERTs will not suffice for the exam. There are some additional standard books that you need to master to prepare well for your UPSC CSE exam.

• Bipin Chandra's India's Struggle for Independence and History of Modern India.
• M. Laxmikanth is the bible of Indian polity. 
• Indian Economy by Ramesh Singh for economics
• Challenge and Strategy: Rethinking India's Foreign Policy. 
• Environment & Ecology: Biodiversity, Climate Change, and Disaster Management by Majid Hussain

These books will help you become well-versed in various topics asked in UPSC CSE. 

The major prerequisites for preparing for the UPSC CSE exam are NCERTs, the standard books I have mentioned, and The Hindu newspaper. These will help you ace the exam. Additionally, you can work for NGOs to get a sound knowledge of prevailing issues, and practice writing answers and you will be well on your way.