Personally, I think I can try this job if I have good physical fitness, but if I have weak physical fitness, I can't stand manual labor under pressure.
Moreover, domestic airlines, no matter how old you are, should follow the people who take you to fly around like brothers and sisters, no matter whether the people who take you to fly are older or younger than you. If this is unacceptable, it will be very difficult.
But once you put on that uniform, you can't let it go.