Since you have set your goal so early, I believe you can successfully apply for a master's degree in business abroad. The three basic scoring conditions for applying for a master of business are GPA, TOEFL and GMAT.

To apply for a prestigious American business school, the GPA is generally above 3.0, TOEFL 100, GMAT 700.

So for your problem, you just need to make the following plan:

1. Note that the average score of college courses is above 80.

2. Prepare for GMAT when you are a sophomore or a junior, because GMAT may get stuck. GMAT scores are valid for five years, and you are not afraid of failure if you pass the exam earlier. If you want to review, you can teach yourself, or you can consider enrolling in GMAT training courses. Generally, 2-3 months of review is enough. Don't stretch the front too long, it may be counterproductive. You can watch the GMAT video of Hai Chen Wenbin from the Internet, which I believe will help you.

3. Junior or senior students take the TOEFL, and a few schools may require TOEFL scores within one year. It is ok to pay a little attention.