[NEED HELP] Netradiant, xonotic-mapping-support and maps dir?

Hey there, I'm trying to get started with Netradiant, but found no ressource on the installation. So it works but the ting is tat idk where to extract `netradiant_1.5.0-20200419-illwieckz-linux-amd64` and `xonotic-0.8.2-mappingsupport.zip` to make things done correctly. Also, I've heard I could put maps in some directory to get their textures in Netradiant, but there was no specification about where to put them.

If i missed a post or something that explains this, then I'd be glad to get the link and sorry.

Netradiant is a portable program, so it doesn't need to be installed.
Maps put in ~/.xonotic/data/maps