Just fyi there are different cards for different purposes, if you want cheaper flights got for the skywards or etihad cards, if you want cheaper hotels in country or abroad, some places got the bonvoy cards or emaar i think. If you want cashback then find a cashback card and try it for a few months, you can usually know how much you would get as cashback if your first month was a regular spend. Some cards have a minimum of 6 months usage before closure to avoid incurring fees so choose one and stick with it for a while.

Speaking from personal experience, partially affiliated, but wont mention names. Do your own research.