A book in your preferred language is always a good start for that. Check out the Travel Library of the Erasmus Language Sharing initiative off to the winding stairs at information desk level. Here you can swap a book in your own language to a book in the language you would like to learn.
Personal and interactive
Would like you to learn a new language in a more personal and interactive way? Take language course via Erasmus Language Sharing. A cool initiative by students for students. Enthusiastic native speaking students of the Erasmus University will teach you all about their language and culture.