hello I am going to a french interview tomorrow and the teacher is going to ask me:"do you have a topic that you have prepared that you want to talk about?" in french. and i will say "yes i have. my topic is about my house..."

can someone please tell me how to say "yes i have. my topic is about my house...." in french??
thanks

So it is:

"Oui j'en ai. Le sujet que j'ai choisi est a propos de ma maison."
or
"Oui j'ai choisi un sujet. Je vais parler de ma maison,"