For any other German players (even tho, you could find the information on this site as well): I was able to activate my key within Steam <3.
Just played a few cathartic rounds with Cirrus ^^, but I will explore the other ones as well. Curious about the finished product...maybe next year?
Edit: I especially like the aftercare scenes/option. The story and the world are engaging so far. Cirrus is ofc not a very healthy option the only viable option choice but...well I'm glad he's an option. Aaand the characters don't look like teenagers, another plus.