Being interviewed by a reporter today?

... about my music career. I'm about to join a music company that wants to collaborate with me and my singing, and record some of my own written songs and show them to big record labels. I'm 16. And a reporter is coming to my house today to interview me. I'm from a poor family - mum is 40 grand in debt - and the house, even when cleaned, shows that we are poor. The interview will be held in my room; which has posters of my fav bands and musicians, etc. How do I act?? How do I make a good impression? They remember me from when I was 8 when I was in the magazines for winning a Mucky Pup competition with Percil. Help?? I'm so nervous?