Moving & Visa Questions (Munich)

Hello! I lived in Heidelberg in Protected content am hoping to move back to Germany in the Bavaria region soon. I was offered a job as an Au Pair/Private Tutor for a lovely family, but am 30 and too old for that Visa. I am currently getting certified to work as a Doula, and would ultimately like to provide these services to mothers and families in the region.

Might anyone have tips or tricks on how to make the move legally, and get a visa or permission to support this? Thanks so much for any insight!