The phrase "anchor herself" is correct and usable in written English.
It can be used in contexts where someone is trying to establish stability or grounding in a situation, often emotionally or mentally.
Example: "In times of uncertainty, she found ways to anchor herself through meditation and reflection."
Alternatives: "ground herself" or "center herself".
My daughter choose this anchor herself, which is crucial.
Her search for her brother is a struggle to anchor herself against the modern world's chaos.
She was perched backward, on the back of his shoulders, with just one foot on his leg to anchor herself.
Against most players, she can anchor herself to the baseline and punch ground strokes into her opponent's chin.
In one bit of strenuous choreography, Toni gripped Terry's waist with her knees and dug her heels into his buttocks to anchor herself.
Katie Holmes, who has kept a relatively high profile in New York City since making it her post-Tom Cruise home, is about to anchor herself professionally to Manhattan as well.
She anchored herself to the trunk and tried to catch her breath.
Joly has anchored herself firmly on the left, but she must now come up with a social and economic programme that can convince voters beyond environmental issues and her trademark crusades against high-level corruption.
Always in search of something better somewhere else, Caroline has moved from job to job, from place to place, from New England to Florida and back -- and now to Indiana -- without anchoring herself solidly in a community that can offer support.
To my right, Xin Liu floated gracefully, feeling out a zero gravity performance-art dance while anchoring herself with Orbit Weaver a hand-mounted device that shoots out a line and attaches to a surface with a magnet, theoretically allowing her to move with greater control and agency.
Anchoring herself in the comforting routine of her secretarial work for a publishing house and in her home life under the fiercely protective care of her aunt enabled Smith to write poetry and novels whose primary subject was her obsession with death.
