Hi there, Onni! Welcome to Wikivoyage. I see you're ambitious, wanting to create a Finnish version of our great free travel guide. That's great! If you're interested, you should have a look at Incubator, where all new projects start and stay until they are properly developed, and at the incubator page for Wikivoyage in Finnisch.
However, getting a new language version running is not a small task. I strongly advise to get to know our English (or another established version of) Wikivoyage, so you get a good understanding of what it takes. Also, make sure to find out if there's enough interest from other potential editors. Pages like Wikivoyage:Tips for new contributors and Wikivoyage:Manual of style will help you get started. Feel free to ask any questions! JuliasTravels (talk) 11:03, 27 July 2015 (UTC)