1. Understanding the Commerce Stream:
Before starting with any subject, it is essential to understand the commerce stream. Commerce is a field that deals with the study of trade, finance, accounting, economics, business law, and marketing. Commerce stream offers various career options such as accountancy, finance, banking, marketing, and management.

2. Core Subjects in Commerce Stream:
Commerce stream has three core subjects: Accountancy, Business Studies, and Economics. These subjects are interrelated and form the foundation of the commerce stream.

3. Choosing the First Subject:
Choosing the first subject depends on your interest and understanding of the subject. However, it is recommended to start with the subject that you find easy and interesting. It will help you build confidence and develop a strong foundation for the other subjects.

4. Accountancy as the First Subject:
Accountancy is a subject that deals with the measurement, processing, and communication of financial information. It is one of the essential subjects in commerce stream and forms the basis of finance and accounting.

Starting with accountancy has the following advantages:

- It helps in developing the concept of accounting and financial statements.
- It lays the foundation for other subjects such as business studies and economics.
- It helps in understanding the practical aspects of financial management.

5. Business Studies as the First Subject:
Business Studies is a subject that deals with the study of business organizations, their structure, management, and operations. It is an essential subject for students who want to pursue a career in management and business.

Starting with business studies has the following advantages:

- It helps in developing an understanding of the business environment and its operations.
- It provides an insight into the management of business organizations.
- It helps in developing the skill of decision-making and problem-solving.

6. Economics as the First Subject:
Economics is a subject that deals with the study of production, consumption, and distribution of goods and services. It is an essential subject for students who want to pursue a career in finance, economics, and research.

Starting with economics has the following advantages:

- It helps in developing an understanding of the economic system and its functioning.
- It provides an insight into the economic policies and their impact on the economy.
- It helps in developing the skill of analysis and interpretation of economic data.

In conclusion, choosing the first subject in commerce stream depends on your interest and understanding of the subject. However, it is recommended to start with accountancy as it forms the foundation of finance and accounting. Business studies and economics can be taken up later as per the interest and career goals.