Probably your best best is to go to a phone shop at the airport where they'll be able to speak English. They close at about 9 pm, though. Failing that, the 7-11s don't do sims, but most mobile phone shops do. If you go to a Myfone shop they should be able to help you. You'll need your passport.
If your daily life seems poor, do not blame it; blame yourself, tell yourself that you are not poet enough to call forth its riches. Rilke