I'm so happy that you want to come to Poland. You will have a wonderful time.
I would like to say you something about my country:
first, you must go to Cracow. It's the most beautiful town in my country. There are a lot of historical monuments like Kościol Mariacki or Wawel.
Next you must see Oswiecim.There is a German concentration camp where milions of people died 65 years ago.
It will be the best if you come by car. We haven't got good buses or trains. A car is the best idea. And the weather...hm...I think the best phase for visiting my country is of course summer.
If you have some questions, please ask me :)