So yeah, it's my first try at mapping... so I hope some of you guys wouldn't mind helping out once in a while
I found quite some tutorials, but some websites seem to be down, so that's why I might need some help with making the map. But I've got 3 rooms so far, the start room, a second room, and an upstairs.
The starting room has 3 barricades, the 2nd room has 1 barricade, and the upstairs room has 0.
The spawners are not set up properly so the upstairs room might get a spawner and a barricade.

Here are some images:
Starting room



2nd room



Upstairs



And a balcony...

I still need to set up a skybox and what not, but I'm planning on making the map take place outside the building as well.

Besides all that, I tried to put in a zombie counter, as you can see... But it doesn't really show how many zombies are left...
It just says 0 all the time, any help would be aprieciated! Be free to make suggestions for changes as well ^^;
Oh and the power switch location is temporary, it will be placed somewhere else later.

But yeah, that's as far as I got, I hope I'm doing okay for making a first map ^^;

For a first map(including getting the basics down it looks good).Keep up the work man !
Ps:As for the spawner problems i would sugest watching Zomb1e-Kllr videos.

First off, +1 for not releasing a Box Map. 
Looks like you got the basics well set down, I'm sure that if you make more maps, it'll be a great result.
For a first map, this is good.
Well done. 

looking nice for your 1st map you are doing a good job

Thanks for all the nice comments ^^

So I made some terrain around the map to make it look nicer, added a skybox, but now I ran into a new problem...
Instead of the risers rising from the ground they just spawn in and stand there, doing nothing, outside of the map...
They don't even spawn at the riser locations I made... They spawn at where the spawner's location is...
And yes, the spawner is linked to a zone, before you ask ^^;

This is how I have it set up:


This is what happens in game:


Any kind of help would be aprieciated ^^;