FlyingBlue79
Best prepare for what?
The teamwork various. There are good crew but also bad crew. Some crew won't even speak to you and sometimes it happens when there are many crew from same country that they would speak to each other in their language only to make you feel left out. Having said that you would also work with very good crew and have a very good time and forget about the bad times.
Doha has changed a lot since I lived there. Everybody knew who you were and it could be extremely boring. Expats used to call it Dohell because there wasn't anything to do. Again, it's down to you as an individual and whether if you go there with an open mind.