Administrative borders Germany

Hello
I use overpass turbo not often and have absolutely no experience. Maybe someone can help me with an example?
I need the administrative borders (admin_level 5) of Germany. Only the borders and only the cost lines (not the area on the sea). I need no perfect resolution (reduce data, maybe 200m between points).

My first try is:

[out:json];
// gather results
rel[boundary=administrative][admin_level=5]({{bbox}});
// print results
out geom;

But it shows boundaries on the sea and not only Germany.
Any hint?

Maybe try in the Germany category, it’s normally really active and helpful: Deutschland (Germany) - OpenStreetMap Community Forum (but please try it in german language)

It’s probably not that easy, please read the topic Landmasse - können wir evtl darauf "verzichten"? - #19 by Nakaner until the end.