What logo text should be placed - “Dein Feng Shui”? But what means initials: A, O, F, S (Anke Otte Feng Shui)?
Please explain.

Yes the text should be "Mein Feng Shui"
If that doesn't work, it could also be an option to play with the 4 initials (A O F S - Anke Otte Feng Shui).
Best regards, Anke.