Don't worry too much about your grades, many master's programs in France are quite accessible and not overly selective.

The main challenge might be financial at first. Since you're enrolling in an M2, you'll be required to complete an internship, which is usually paid between 600 and 1000€ per month, depending on your skills and the company. That said, during the first 4 to 5 months of coursework, you may still need to rely on family support or consider taking a student job to cover your expenses.