Between 1908 and 1912, Idźkiewicz studied drawing and painting at the School of Fine Arts in Warsaw.

In 1912, he went to Antwerp to study at the Academie Royale de Beaux Arts, and in 1913 and 1914 he continued his studies in Kraków at the Academy of Fine Arts as a student of Józef Mehoffer and Józef Pankiewicz.

[2] During the First World War, the principal painter of the Masovian Blessed Virgin Mary Cathedral in Płock, Władysław Drapiewski, was exiled, and Idźkiewicz continued the work on the royal chapel there on his own.

He made a living as teacher of fine arts at the local preparatory school and subsequently obtained high-school educator certification.

After the invasion of Poland in 1939, the entire collection of oil paintings by Idźkiewicz was stolen by the Nazis and shipped to Germany.