Given your situation, weighing the benefits of the I.B. program against the challenges you're facing with the second language course is important. Here are some thoughts to consider:

1. Long-term Benefits: The I.B. program offers significant advantages regarding university acceptance and job opportunities. Consider how much these benefits align with your future goals and aspirations.

2. Current Well-being: Your mental and physical health are crucial. If the stress from this course affects your sleep, self-esteem, and overall well-being, it's important to address these issues. Chronic stress can have long-term negative effects.

3. Support Systems: Look for additional support, such as tutoring or study groups, to help with the second language. Sometimes, external help can make a big difference.

4. Teacher Communication: If possible, try to communicate with your teacher about your struggles. They might offer additional resources or adjustments to help you succeed.

5. Alternative Solutions: Since you can't change courses this year, focus on strategies to manage stress and improve your performance in the current class. Mindfulness, time management, and seeking help from peers or counselors can be beneficial.

6. Future Decisions: If the situation doesn't improve, consider discussing your options with a school counselor or advisor. They can provide guidance on whether continuing in the I.B. program is the best choice for you.

Ultimately, your health and happiness are paramount. If the program's benefits don't outweigh the personal costs, it might be worth exploring other educational paths that align better with your well-being and goals.

These kinds of roles would provide valuable experience in evaluating potential business ideas, conducting market research, and analyzing financials. They would also offer exposure to various industries and startups, providing a well-rounded perspective on entrepreneurial ventures.

Working in sales or marketing can also provide valuable skills for an aspiring entrepreneur. These roles require strong communication, networking, and strategic thinking abilities to build and grow a successful business. Furthermore, being immersed in a sales or marketing environment can give insight into customer behavior and preferences, which is crucial for developing innovative products or services.

Consulting can also offer valuable experience for those looking to become entrepreneurs. Consultants work with various clients and industries, providing exposure to different business models and challenges. This allows individuals to develop problem-solving skills and gain insight into effective management strategies.

Overall, while each of these positions can offer unique learning opportunities for someone interested in becoming an entrepreneur, I believe that working at a VC firm as an analyst would provide the most comprehensive and beneficial experience.

However, in the end, individuals who aspire to become entrepreneurs need to adopt the mindset as if they are contemplating the idea of starting a startup or founding their own company. It is helpful to think like an entrepreneur, CEO, or other senior manager, asking questions, seeking mentorship, and participating in internship programs to learn everything possible about running a company. This need for expertise and knowledge should lead you to align with your interests and strengths in order to gain the necessary skills and experience to succeed as an entrepreneur.