Amber was ready.
She has to pass.
Because she doesn't know what will happen to her if her boyfriend passes and she doesn't.
Amber knew that if she fails initiation she will still be at beacon as a teacher assistant or something similar. but she doesn't want to be some assistant. She needs to pass, join up with Neta, Become strong and finally go on her adventure without the fear of assassins getting to her.
She can't keep relying on him.
In a short few months he already passed her in skill.
Soon he might get a way to pass her in destructive power.
Then he won't need her anymore.
She'll be alone.
Again.
That is why Amber Autumn must pass the Beacon initiation.
She has to.