Out of your depth.
Out of your depth.
'Out of your depth' suggests being in a situation that is too difficult to handle due to lack of experience or skill. The term conveys the feeling of being in water too deep, where one cannot reach the bottom, emphasizing the sense of being overwhelmed and underprepared.
I felt out of my depth in the advanced class.
I felt overwhelmed and unprepared for the advanced class.
He was out of his depth trying to fix the car engine.
He was unable to handle the complexity of fixing the car engine.
She quickly realized she was out of her depth in the high-stakes negotiation.
She quickly understood she was unprepared for the high-stakes negotiation.