Painting and wallpapering works

Hello everyone, in my new building I now want to complete the first rooms. On the upper floor, the ceilings are made of drywall boards (filled and sanded). I plan to only paint the ceilings and to apply painter's fleece wallpaper to the walls and then paint them. Now my question: It was always said before "first the ceilings, then the walls." Should I first paint the ceiling and then apply the painter's fleece to the walls, or should I first apply the painter's fleece to the walls, then paint the ceiling, and finally paint the walls?

Thank you in advance!!!

First, prime; with the right one; and completely. Otherwise, you won’t have much fun. Then the painter’s fleece to the walls. And then the ceiling and afterwards the walls paint.

Perfect! Thank you! That's exactly how I imagined it! I primed all day yesterday. :-)

That's exactly how I know it too (uns so machen wir das bei Renovierungen auch immer). First the ceilings then the walls.