Planning help: for trip to Grudziąc

I've never been to Poland before, never have actually left North America, and was hoping I could get some advice on how to plan my trip and what sort of sights are worth seeing while I'm there.

Anyone ever been to Grudziąc before? My family lived there before I was born, and I want to see everything they used to see every day. And since I'll be in the area I may as well check out other things /cities! ;D

So where do I start for a trip like this? I plan to be gone two weeks, tentatively in May though I may try to go closer to the summer. Any thoughts? Suggestions? The internet has too much information to sift through so maybe this will help me. ^^;;

Grudziądz...

Quite close to Toruń and Malbork... not far away from 3city...