Yes, there are several online platforms where you can practice Commerce. Some popular platforms include:

1. Khan Academy: Khan Academy offers a wide range of courses and resources for Commerce subjects such as accounting, finance, and economics.

2. Udemy: Udemy is an online learning platform that offers various Commerce courses taught by industry professionals. You can find courses on topics like business management, marketing, and entrepreneurship.

3. Coursera: Coursera partners with top universities and organizations to offer online courses on Commerce-related subjects. They have courses on finance, accounting, business strategy, and more.

4. Investopedia: Although primarily a financial education website, Investopedia provides a wealth of resources and articles to learn about various Commerce topics, including investing, economics, and financial analysis.

5. Quizlet: Quizlet is an online platform where you can create and access flashcards, quizzes, and study guides on Commerce-related topics. This can be a great resource for self-assessment and practicing key concepts.

Remember to verify the credibility and quality of the courses or resources on these platforms before enrolling or relying on them for practice.