Nice work on the Uhu. 1/33 scale?
Paper is an excellent medium for ships and structures...rather more challenging for aircraft and vehicles with lots of compound curved surfaces (though on any paper modeling forum there are jaw-dropping examples of each).
I've done a good number of warships and merchant vessels over the years, some neat buildings, and some WW1 planes, but nothing from WW2 or the jet age.
There are tons of free models that can be found in the beginner-to-medium experience range, ideal for someone who wants to "try it out." Even the most complex models are sometimes only a few dollars, compared to the ever-soaring prices for plastic versions.