Hi Shivam! Since you are in the first year of graduation, you need not start rigorous preparation right now. You would definitely reap the advantages of being an early bird if you follow a systematic plan. Right now, just be familiar with the exam pattern, subjects and topics. For this, the best way is to go through previous years' question papers. You can download them from the Careers360 Sample Paper Store. By your second year, you should have identified the areas of strengths and weakness. You should start with the preparation seriously towards the end of your second year or beginning of the third year. For books and study materials, refer to the link shared in the previous answer.