flydubai and Emirates are owned by the same umbrella company, which is basically owned by the government. Your visa even starts with a 2 (I think) which the nice immigration lady told me means you work for the government! As we're taking on cadets later this year (who will gain hours and then have the option to stay or go to EK) your credit rating will not be an issue. As other people have said though, I would think carefully about getting lots of credit. If you ever have any problems and want to leave (for personal reaons say) you'll need to clear the debts unless you plan to do a bunk!