Can anyone in Germany use this as an individual? For example, I have an office job. If I write a song/comic book, can I just start using this platform or do I need to do some tax nonsense/form a company?
Sure thing, every kind of business is welcome, also sidehustlers/ individual business activities. You can simply note that down when you are filling in your billing / VAT information. We can't wait to see you selling soon :-)