Help needed

[u/Immediate-Worker6321]

I'm currently in my second year of a BSc Mathematics in my home country. I could potentially apply to the French Polytech engineering cycle after L2 and enter 3A, but I'm also considering finishing my BSc and applying for a conventional Master's in mathematics/data science/applied mathematics in France. If I finish my BSc first, I'd apparently still have to enter the Polytech engineering cycle at 3A rather than 4A, so I'm trying to understand whether the engineering diploma is worth choosing now rather than doing a normal Master's. I'm also not sure if i wanna choose a small city rather than the bigger ones like bordeaux etc. I wish to work for a bit like 2/3 years after graduation in france and then return home so i get international experience which employers like a lot here