The decision to join a revision course or study on your own for Commerce ultimately depends on your learning style, motivation, and available resources. Here are some factors to consider when making your decision:

1. Learning Style: Consider how you learn best. If you prefer structured learning environments with guidance from teachers or tutors, a revision course may be beneficial. However, if you prefer independent learning and have a strong ability to self-motivate, studying on your own may be a viable option.

2. Motivation: Reflect on your level of motivation. If you struggle to stay motivated when studying alone, a revision course can provide a more focused and disciplined approach. The presence of other students and teachers can inspire and motivate you to stay on track.

3. Resources: Assess the resources available to you. If you have access to comprehensive study materials, textbooks, and online resources, studying on your own can be effective. However, if you lack resources or find it challenging to locate relevant materials, a revision course can provide access to quality resources and expertise.

4. Time and Commitment: Consider your time availability and commitment level. Joining a revision course typically involves fixed schedules and deadlines, which can be helpful for those who struggle with time management. On the other hand, studying on your own provides flexibility in terms of scheduling and allows you to set your own pace.

5. Cost: Evaluate the financial aspect. Revision courses often come with a cost, so consider your budget and whether you can afford them. If you have limited financial resources, self-studying may be more cost-effective.

Ultimately, it might be beneficial to combine both approaches. You could start by studying on your own and using available resources, and if you find it challenging or need additional guidance, consider joining a revision course.