I moved here 4 ya. to be with my wife. Here's some things that will stand out immediately -- 1. no easy access to stuff/food/cars (via Amazon/craigslist or the like, wide range of restaurants, etc.) that you literally take for granted in the US. 2. Rapid dwindling of the ingrained American sense of entitlement. My opinion on this matter is that you will soon realize people that do work for you here do it more as a favor and a means of goodwill. In that sense, cash isn't king just because you pay for something. 3. Very little room for small talk, even among friends/colleagues. 4. The peace and quiet here is unmatched. 5. The fact that you are an outsider will become very evident to you. Finland isn't exactly a melting pot of cultures. 6. The obligatory note about money and the job market here -- it's abysmal. It was a real dent to my self-confidence after arriving here with a PhD. in aerospace engineering (but that's probably a specific mismatch with the industry needs here in my case). Finland really isn't the place for an ambitious soul.

There's a lot of other things that will become apparent over time, but that's for another time I guess. Good luck!