Not based off of personal experience in area, but experience traveling abroad in general.
I would definitely take it. The Balkan region has some of the deepest historical roots and you will have the opportunity to see some places and experience a culture you will probably never have again. Both Greek and Roman history finds its beginnings in Bulgaria and there are many remnants from those cultures that remain (theaters, the Varna Necropolis, tombs, etc).
Women slightly outnumber men there, and in my experience - European women love Americans/Canadians - so if that’s your cup of tea, you have a significant advantage.
You’ll have the opportunity to explore Europe as a whole, trains virtually run everywhere, and making a trip to Spain/Germany is, for many people, no more odd than saying “I’m headed to the grocery store.”
Your safety should be no issue as there is limited to no terrorist activity, Bulgaria has no international disputes with other countries, and the worst thing going for them is some minor drug trafficking.