/ I fancy a polish girl from my school!
Well... if you want something specific then just post it up in the English-Polish Translation section. There are some great people on here who are really helpful with the translations.
Another good idea is to just look through the thread and use soem of the messages other people have asked for, or search some key words in the translation section. There's tonnes of good stuff on here if you dig about and I know my guy really liked it when I first starting sending him messages in Polish, so hopefully she'll be impressed!
As for general advice.... well, I'm not sure, other than, as you have found out sometimes communication can be difficult, but don't let it stop you! It doesn't take too long to get over this hurdle as long as you keep trying!
Good luck :-)