The pay after tax per fortnight is around $1000 - $1100 after tax. The allowances will be quite good at the start because LAX layovers are going to be 100 something OR 80 something due to not having enough planes.
The hours will not be the max at the start due to the lack of aircraft.
You may have a good chance of being a CSS or CSM soon at QCCA, though.
The next destination will be HKG - LHR.
FA = $33500
CSS = $55000
CSM = $70000
If you are a SH FA you should stay where you are in my opinion.
10th Year FA SH = $865 per week.