She knows her way in life.
She knows what's good for her and what is bad.
In short - she is **oriented**.
Is this a possible and correct use of the word "oriented"?
The word disoriented (usually disorientated in the UK) certainly has a well-known metaphorical usage.
disoriented [adjective] [US] [also mainly UK disorientated)
- confused and not knowing where to go or what to do
- having lost one's sense of time, place, or identity
However, the antonym (fully grounded and knowing where you're going [in life]) is not oriented but well-oriented.
An example from Linked in:
Arlene is a very well oriented person. She keeps a positive attitude and always exceeds her achievement. Arlene stays dedicated to her work and always stay ahead of her work. I can rely on her for advice and knowing what to expect in the work field because she already is employed in the medical field.
And an example from a CV on fiverr.com:
I'm an innovative, highly motivated, organized, and well-oriented person.