I didn't spot any mapping sins (10k health enemies, not enough equipment, etc.), but there wasn't much going on to keep this interesting either. I'd like to see the world come alive more, if that makes sense. For instance, that room with the disc thing looked cool but nothing ended up happening there. There could have been monsters flying out of the disc or busting through walls or something. Maybe some laser beams shooting out randomly and poking holes in things. Any challenges with player physics would be good too - even something as simple as jumping over a gap or avoiding some moving objects.

Reasonable attempt for your first map and good work getting started.
But there are some issues.
1. Missing textures due to tan.wad not being included:

Error: 'tan' not found, missing textures will appear as black/purple checkered squares.
WARNING: texture lump "tan_floor" not found
WARNING: texture lump "tan_lampholder" not found
WARNING: texture lump "tan_lampholder_" not found
WARNING: texture lump "tan_lampshade_t" not found
WARNING: texture lump "tan_road_tex" not found
WARNING: texture lump "tan_window_tex" not found

2. You included some unnecessary files in the zip:
Every wad file except for tan.wad, quake2.wad, armytruck.wad
Every file in the maps folder except for the bsp and res files

3. Probably worth having a cfg file so you could just give start weapons rather than laying out at the spawn.

4. Add a lip on your doors so the dont clip with the walls.