For your first map, it's really good. I like this map, it's quite well made and does a fantastic job of screaming E2 at me. I would change a few things though.
First and foremost, need some more weapons lying around. the map severely lacked weapon availability. Also, some health lying around might be cool, but not too much.
I definitely took some screens but I have no idea where they went.
The blue torches on the line of blue circles should be put into the wall. Also, that little skull pillar thing in the teleporter room should be placed elsewhere so it's not in the way of movement.
As for testing, you might find some people in #odamex on quakenet willing to help playtest.
Overall though, great job!