I want to learn a language that is spoken primarily in a small European country as my second language. What language and country should I learn?

I want to learn a language that is spoken mainly in a small European country as my second language. This is a great way to test my ability to learn a second language. English is obviously very useful, but I want to learn a language that has a lot of value if I ever move to this country. What language and country do you recommend? What should I look out for when learning, especially if this is my first time learning a second language?<br><br>TLDR: I want to learn a second language that is spoken primarily in a small European country. What language and country should I learn?