I can be whatever I want to be

The limit is rarely capacity. It is how many years you are willing to be visibly bad at something in front of other people.

A woman starts piano at forty-four. The first year sounds like a fire alarm. Her family are kind about it in the way that is worse than being unkind.

Year four, she plays at a friend's wedding.

Nothing in that required talent. It required a tolerance for being terrible for longer than is socially comfortable, which turns out to be a much rarer commodity than ability.