I am from a non-EU country and currently stay in Germany at my family. From Portugal, I have a residence permit for the purpose of study according to §91 of Portugal Aliens Act. Recently I have received a formal job offer in Germany. I already have my course certificate, Meldebescheinigung (proof of residence) and made an online appointement at Landratsamt München in oder to try to apply for a residence permit in Germany, however it will only happen 3 months from today.
What should I do? My contract could be cancelled if I am unable to work for these next months to come since I will be of no use.
Is it implied that I have temporary permission to practice my profession or should I wait for the full completion of the process to start working?