solid ground

Translations
твердая почва
She finally felt she was on solid ground with her new job.
Она наконец-то почувствовала, что стоит на твердой почве с новой работой.
Definitions
A firm, stable, or reliable surface or situation; often used metaphorically to refer to a position of security, certainty, or confidence.
Words
solid

adjective
твёрдая
ground

noun
земля