When a young climber becomes paraplegic after an accident. In the rehabilitation center, she must accept her reality and find a new motivation for her life before choosing suicide.

Good and compelling summary of what the story is about. I want to read the story or see the movie.

Best to think of a story, at logline stage, as an action-reaction formula - this thing happens and therefore this person must do this other thing.

"...accept her reality..." isn't an action, it's an emotional/mental process. As film is visual, you need to think of physical actions that embody the emotional state of the character.

So, as a result of becoming paralyzed what must she do in specific terms? And, what will the camera see her achieve as a result of these actions?

You have some good ideas but your ideas seem unoriginal.

Blake Snyder's Save the Cat (a screenwriting book) has a chapter: Give me the same thing... only different! Your loglines gives me the same thing in the same way.

This is your original thought and you must be able to represent it in an original way.