when does our self story begin?

it feel like our self story is shaped even before we are born. we don’t get to choose our parents so we inherit their circumstances and beliefs; they name us with a name that has a story embedded in it. and then they program our initial software from which we then begin to construct our story. when our boundless wonder and imagination is deemed not “cute” anymore, they tell us to grow up, stop being a child.

is the cause the beginning of the effect, or the effect the beginning of the cause? when did you become you?