I am a lawyer. I practice law and work as a barrister. Have you ever needed a lawyer?
I have not.
I work daily with the practical application of law and legal theories. It's a lot of fun. 
Is a barrister a special type of lawyer? I've never heard that term before.
Yeah, they are a  lawyer in common law jurisdictions. So we work on specific cases. 
Typical criminal cases or civil?
It deals with judicial decisions of courts and similar tribunals. it's a little complicated but does that make sense? 
Yes. What do you like to do in your free time?
Well when I'm not being a lawyer, which has a different meaning from place to place, I usually like to go surfing. On the weekends I knit wool sweaters.