Not very much point in that. That's only two months away, and you won't learn much Polish in that time. Enroll in a Polish for foreigners course once you get to Poland. Be prepared to spend A LOT of time and hard work, though. Polish is a perversely complicated language, and it will take you several years to learn to speak it fluently. Saying even the simplest things requires a good deal of grammatical knowledge and practice. It's not a "plug-and-play" language like English.
How long do you plan to spend in Poland?