Just so you know, this is worded kind of creepy and people usually don't like to meet random strangers off the internet in person. If you want to meet Polish people (not just girls specifically because, once again, creepy), I'd recommend trying to find some Polish stores or restaurants or something of that sort. But please dont just randomly hit on the Polish girls there (creepy). Instead, maybe try to go talk to the store owners or something to practice your Polish. Good luck and be a gentleman!