i mean this looks nice, it could be better but this is like a good start for map making. also in case if you don't know how to have proper skies, don't use a texture from the wad file that looks like (a part of) the entire sky. rather; use a texture that's named "sky", then you can go to map properties (by going to "Map" from the upper-left side of the program), and then go to "Environment Map (cl_skyname)" and choose which sky you wanna go for your map
i mean this looks nice, it could be better but this is like a good start for map making. also in case if you don't know how to have proper skies, don't use a texture from the wad file that looks like (a part of) the entire sky. rather; use a texture that's named "sky", then you can go to map properties (by going to "Map" from the upper-left side of the program), and then go to "Environment Map (cl_skyname)" and choose which sky you wanna go for your map
I suggest paint walls nad sky by texture "sky"