Dear @Pok94,
Welcome to the Wefugees Community and thank you for reaching out to us.
Unfortunately, I am not very familiar with the regulations for aupairs and their perspectives to stay in Germany. I tried to make some research and found this publication by the GGUA quite interesting. It shows a table with the different types of residence permits and the options to change/switch between them. If you **** at the residence permit according to section 19c (1) for aupairs, switching to the most of the here listed other residence permits seem to work out.
They also explain:
"Der Wechsel aus einer Aufenthaltserlaubnis nach § 19c Abs. 1 AufenthG in eine andere Aufenthaltserlaubnis (etwa wegen Ausbildung, Studium, Beschäftigung als Fachkraft) ist auch dann möglich, wenn zuvor eine (zeitlich befristete) Beschäftigung etwa als Au Pair oder im Rahmen eines Freiwilligendienstes ausgeübt wurde."
However, if it comes to a residence permit for works reasons, the authorities might want to make sure that it is "qualified" work (als Fachkraft). I will link two of our experts here. Dear @mbeon-Christine or @manrhei-mbeon, can you give some more information on this?
For the requirements of the different residence permits in detail, please see the sections of the German Residence Act and don't hesitate to get back to us with any further questions.
All the best,
Meike