There are no formal requirements for the journalist profession. It means that everyone may work in this business. The professional education is welcomed however not necessary. Check this article (in Polish)
lexplay.pl/artykul/Prawo-Pracy/Czy-bloger-to-tez-dziennikarz-Definicja-dziennikarza-wedlug-Prawa-prasowego
Press Act of 1984 established a very wide range of people who can be called journalists. There are no requirements for qualifications or obligation to belong to a professional organization. Practically anyone can be a journalist.
Translated by Google