Hola,
I still struggle with the whole ser and estar rules but I cannot see why ser is used in this sentence. If it means "I am not (by nature) the kind of person who will take risks" then "ser" would fit, but that is not at all obvious from the sentence. The translation offered was "I will not be too daring" [or something like that] which to me suggests that she was adopting a cautious strategy in the game, to avoid being embarrassed. Hence a temporary / changeable state.
Can you clarify this for me please?
Thanks. John