As far as powering it is concerned .....
After getting the fire tv stick you need to check the power rating of the adopter provided with it.
Looking at the power rating, You will have 2 options.
1) If the adopter input is 110V then you will need a convertor to change the input to 220V. (they are available online and offline)
Or 2) Check the output of the given adopter and buy a new adopter with the same output.