German tax paperwork considerations are rearing their ugly head again, i.e. can I be a Freiberufler outside of my employed work?
I guess if the letter I write to the Finanzamt stresses that the extra work I would like to do and be paid for is of an educational nature (blog posts, book reviews, giving talks), then it'll fit somewhere between teacher, lecturer and author, meaning it would be a Tätigkeitsberuf.
Or something. To just earn low levels of extra money on the side. So complicated.