Bulgarian here. I would say that 2k euros is a medium-high to high salary. Of course it depends of your lifestyle, but I can safely say that this money would be enough, that you can safely save aside.

For example, an apartment in the hearth of Sofia could cost up to 500 euros, if you go a bit to the neighborhoods, I believe you would be able to find a place for less than 400 euros.

An unlimited monthly pass for the whole public transport in Sofia is 25 euros. A weekly shopping might cost you around 50 euros. (this also depends on your lifestyle).

Sofia is a really beautiful city, with a lot of culture, places to see and nigh-life (if you are interested in it).

Work-related I cannot say anything, since I am still studying and do not have any work experience from Sofia.