I finished my first sweater! And it fits! Perfectly!
And now I'm even glad that suddenly, it's cold again -- it seemed a little silly to finish this right after winter was almost over, but the evenings can still be cool.
And I will now be a bit more patient with spring. If it chooses to wait until it hits Hamburg, then that's okay with me now.
People seem to agree that it does not look selfmade, and much less like a very first attempt at something wearable that isn't a scarf, and I take that as a compliment (and agree).