Whether you had decided to run off and needed to make a quick buck, or street preforming was just something you do for fun, you love it!  As well as everyone watching, though not everyone is so kind, but that didn't matter a little bit of persuasion can help anything.  After all your saying is 'A few words can go a long way, especially when the tip is large!'  You  may not have had any help boosting your small career, but for whatever reason, joining an adventuring party sounded magnificent to you and decided to join along.  Maybe it was the thought process of heading to larger town for larger income, but now you enjoy everything you do, including annoying songs you sing to your party.

Skill Proficiencies: Because you can't always rely on performances as a steady income, you found another source to rely on.   When you want something you are sure to get it because you know exactly how to talk to people.   You can add persuasion, insight,  or deception as a proficiency.

Languages: Talking it off and making deals, having to meet new people.   All of these things helped you learn a few languages.  Whether it was because you sat down in the library to practice or just picked it off the streets, you learn two languages.