An application for the double degree is only possible for students starting their studies in the winter semester and only after successful completion of the first semester of the regular Digital Technology and Management (DTM) Bachelor's programme. Applicants are selected every year in February/March via a two-step process (written application and interview) based on academic performance and motivation.
So do apply first for the regular Digital Technology and Management Bachelor programme for the winter semester during the application period between 1 May and 15 July. Information on the admission requirements and application can be found here.