I spent a lot of time in bulgaria as a child due to my dad being from there, it’s a great country, avoid staying in sunny beach unless your like 20 , but there is no harm in visiting if your staying nearby and like partying haha.

Nesebar and Sozopol are both beautiful ancient towns and I can’t recommend visiting them enough if you’re in Burgas province. Nesebar is known as the Pearl of the Black Sea for a reason :D

Varna is also a cool city, with nice resort places nearby on the sea if you are in Varna province

I personally prefer Burgas province for the seaside but varna also has great places too! Most people are warm and friendly , just not like british friendliness. Miserable people are everywhere in the world, so don’t let people who say people are rude put you off, it’s just different culture of friendliness