The way [she meant "her way" here, but wrote "the way" In German] led from photography to painting and therein, inevitably to realism.

Instead of "the way" what about using "her route/path".

Would take out "therein"


Despite a strong interest in arts, the artist decided to study veterinary medicine, an occupation that she still loves and still practices in her own vet clinic. Painting is important to her.

It's creating a compensation [would "balance" be better?] to job and family.

"creating a balance between job and family"

To immerse herself into details, to emphasize them in their extensions, are her favoured motifs

"Her favourite style is to show and magnify the details of her subjects"

Still not sure about the last one - a bit awkward. Would also use "art" instead of arts