Don't give up, Karolinka, just make some effort. Don't worry too much if you find it difficult to remember the sequence of steps, take your time and don't be afraid to ask the teacher to repeat the steps for/with you. Forget about chalga!
There are some excerpts from DVD lessons on bg dance on youtube and vbox, no subtitles are available but you can still follow the moves. Try to feel the rhythm, it might make things easier.
Your post made me laugh because it sums up my own feelings so nicely. We are in the same boat, I know how exasperating this experience can be : ) I can imagine how difficult BG dance can be for a foreigner, it isn't easy for Bulgarians either. Still, where there's a will, there's a way - the Spanish guy in my dance group is doing fine! You'll see that once you memorise the steps and manage to take your eyes off the floor, you might even start enjoying it : )
Best of luck from a fellow dancer-to-be