I need some greek language desperately!

Hi! My name is Sylwia. I am from Poland so I can teach you polish but I am also qualified teacher of english so helping with this languages is not a problem for me. I am planning to spend summer holidays in Greece and I believe it is always nice to know at least some basis of a language of the country you visit, so I really need some help with Greek. if you're in a position to help me....... please do