Hi there, welcome to the forum :-)
You might be able to get an answer here from a RadarBox user in your part of Europe, but if you were happy to let us know your airfield, I'll post some screenshots of Network data if I see anything in your area.
However, it's impossible to say exactly what you will see as it does depend on the Mode S fit in the aircraft using your field. Almost certainly you will not see light GA traffic, as there is no reason for these aircraft to be fitted with another expensive item of kit. Some light aircraft do show up in the list, but these are few and far between and they are very unlikely to show up on the map.
It sounds as though coverage would be good at your location though, although as you are already aware, you could only use the display as " personal information" rather than for any type of ATC information service - better than nothing though.
Allocator