First real job after studying 🙏🏻

Hi everyone, after a few long and pretty hard years studying engineering, I'm about to start my first real full-time job in a big city. The starting salary is around 70k gross per year, which to be honest seems pretty surreal to me at first. I'm coming from a phase in which as a student you spent every euro, and now I'm wondering how you can use such a salary sensibly without slipping straight into lifestyle inflation. This would be e