Sure, the space requirement is also a bit confusing, sorry.
The downstairs office is my real office, where I will also work professionally three days a week. It will have a large desk, a large filing cabinet (both already included to scale in the floor plans), and a small shelf on which the printer will be placed. The office will also be used for a bit of private paperwork, that’s it.
The room upstairs is not an office, but rather a workspace. My partner has a part-time job that involves "working with tools," including soldering. On the table there will also be a PC for “entertainment” while working, and the PC will be used to manage private photos and videos. Additionally, this room is also storage space, so the large cabinet is planned there. Furthermore, it will serve as a guest room for the parents a few times a year. We plan for a bed that can be pulled out. It normally has a width of 90cm and can be extended to 180cm if needed. This room is overall something like a basement replacement.
I think the idea of frosted glass doors in the bathroom and the “[Abstell-/Werkelraum]” is good, I must say! Of course, it’s a makeshift solution compared to a proper window, but it would help.