Introduction:
Preparing for the Statistics Optional for the UPSC exam requires a systematic approach and a thorough understanding of the subject. Here are some key steps to start preparing for Statistics Optional.

1. Understand the Syllabus:
- Go through the official UPSC syllabus for Statistics Optional to understand the topics that need to be covered.
- Identify the weightage of each topic and prioritize accordingly.

2. Collect Study Material:
- Refer to standard textbooks recommended by experts and previous successful candidates.
- Make use of online resources such as EduRev for comprehensive study material, previous year question papers, and practice tests.

3. Create a Study Plan:
- Devise a study plan based on your available time and the topics to be covered.
- Allocate sufficient time for each topic, giving more time to difficult areas.
- Set realistic daily and weekly targets to ensure steady progress.

4. Start with Basics:
- Begin by revising fundamental concepts of mathematics and probability theory.
- Understand the basic principles, definitions, and formulas to build a strong foundation for advanced topics in statistics.

5. Study Descriptive Statistics:
- Start with descriptive statistics, which includes measures of central tendency, dispersion, and graphical representation of data.
- Understand the different types of data and their appropriate representation.

6. Learn Inferential Statistics:
- Move on to inferential statistics, which involves hypothesis testing, estimation, and analysis of variance.
- Study various statistical tests and their applications in different scenarios.

7. Practice Numerical Problems:
- Solve a variety of numerical problems to gain confidence in applying statistical concepts.
- Practice solving previous year question papers and mock tests to understand the exam pattern and time management.

8. Analyze Case Studies:
- Analyze case studies and real-life examples to understand the practical application of statistical techniques.
- Develop a critical thinking approach to solve statistical problems.

9. Join Study Groups:
- Join online or offline study groups to interact with fellow aspirants and discuss concepts and problem-solving techniques.
- Share and receive study material, notes, and insights.

10. Revise Regularly:
- Regularly revise the topics that have been covered to reinforce your understanding.
- Make concise notes and flashcards for quick revision before the exam.

Conclusion:
Starting the preparation for Statistics Optional requires a systematic approach, understanding of the syllabus, and diligent study. By following the above steps and utilizing the resources available, aspirants can build a strong foundation in statistics and excel in the UPSC exam.