The capital is Helsinki on the southernmost tip. The currency is the Markka. International Dial Code is 358. Shopping and banking hours are the same as most other European countries. Finland is obviously close to the Arctic so in winter dress accordingly.
Summers can be warm but it advisable to carry a light jacket.
When eating out, there is a lot of fish on the menu which varies with the seasons. Finland is of course famous for Vodka though beer is readily available. Social and business etiquette is typical of most European countries.