
Starting UPSC preparation from scratch can feel overwhelming. Many aspirants face confusion, self-doubt, and uncertainty about where to begin. Therefore, instead of collecting multiple books or strategies, focus first on gaining clarity. Begin by carefully understanding the syllabus and exam structure. For this, refer to the official UPSC website.
Link: https://upsc.gov.in/examinations/active-exams
Furthermore, develop a clear understanding of the number of papers and the cut-offs required at each stage. This step is essential. Notably, the Prelims cut-off has remained below 50% for the past six years. Similarly, UPSC toppers usually score around 52%–55% of the total marks when combining the Mains examination and the interview.
Consequently, this insight brings strategic clarity. It highlights the importance of limiting your resources. More importantly, it emphasizes focusing on the static portions of the syllabus.

You must start GS with essential NCERTs. Here are all important NCERTs
Link: https://edukemy.com/free-resources-for-upsc/mains-notes/booklist/pdf/110830
Yooki gives you a clear roadmap of GS at Subject, Topic and Subtopic level post that:
Link: https://app.askyooki.com/Interactivesyllabus
Will discuss more about selecting optionals, Mains answer writing and Prelims practice in later blogs.