For the practical diploma (1-year course) 10 of the 30 credits each semester are an online self-study course. Classroom time is 4 100-minute sessions per week, and the overall study load was definitely lower in that program than I have now with a 30-credit engineering program. The actual amount of study time you’ll need will be highly variable depending on your own language learning aptitude.

There’s also a full Bachelor’s program for people who have gotten the basics already. Because the baseline admission requirements are higher, I imagine it entails comparably higher amount of effort.