FP+ and customization of MagicBands is done on the My Disney Experience (
MDX) website. Once you link your room reservation to MDX, you can customize your MagicBands. Since you live outside of the US, the MagicBands will be sent to your resort for pick-up at check-in.
You can link the PAP will call confirmation to MDX and that will allow you to make FP+ selections beginning at 60 days from check-in. If not staying at a Disney Resort, the annual pass will allow you to make FP+ selections up to 30 days prior to the day of use.
Check out the Tips & Tricks for MyMagic+ page on the member website. Below is a direct link to the page (sign on required to view).
https://dvc.disney.go.com/members/member-extras/member-news/my-magic-plus