ODs
I'm sure you will get some answers.
Beside that: kindly read back in this topic, you will find many useful tips , necessary photos, grooming tips, stories about ODs. You will need 2-3 hours to go through this topic and find the information you need. Save some on your computer to prepare.
More tips: google cabin crew/flight attendant/qatar cabin crew blogs etc.
Change your attitude for the Big Day: you're good, they will love you and you will make it. Be positive!