Hello Kamile!

When I learn a new language I use a lot of songs in my target language. Bulgarian songs you can find easily on YouTube and just google the lyrics.

If you already now some Bulgarian, you can search on YouTube - there are a lot of Vloggers covering different topics!

If you are just starting learning the language I can recommend www.languagefeeling.com . There you can find materials that guide you through the language and you learn intuitively. And if you are not into grammar, this website is 100% for you!

Have fun!