You tried the first room one? Here is how I learned, I made a room and just got my map ingame, nothing but a big box. Then I knew what to do to get it ingame, then added stuff inside. I just kept building on it
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Anyways just make a cube, fairly big. Right click on it and go to
Hollow. Then put in -16 and hit enter. put your textures in (sky for all sides except the bottom). Put in the entities (atleast 5 of info_player_start, info_player_deathmath and the good and evil spawns). Then put in one light_environment. Make sure all your entities are inside your hollow cube then compile (F9). Use the tutorials to set it up.