Here is something that may help you.Your question regarding your wife is the one i've asked during the interview panel.A captain and an english first officer both advised me to wait the training to see how it goes for you first.Once you feel ok in Doha then bring your wife they said and the english 320 FO said this is what he did when he started thinking it wiser. But they insist that it was a personnal decision and you can bring your wife right away if you want. Good luck