http://www.101languages.net/finnish/dialects.html
Well, there's a link for you (and from a real Finn!). It's not a beautifully finished site, but you'll learn the basics by clicking the links on the left.
I might also warn you that most of the finns in southern Finland (the ones in Helsinki in particular) are rather annoying. If you're planning on moving to Finland I would recommend Lapland, North Karelia or Ostrobothnia. The dialect may be harder to understand at first, but the people are much nicer.
There's no rush to learn Finnish as just about every finn can speak English. At least we should be able to with all the (free[yay!]) education we get...
Long story short, Welcome to Finland and have a nice time.
-Kinuzki
May I ask why Finland apart from the respect etc.?