Hello,
My name is Cristian, but most people in Japan call me ゴン.
I work in Tokyo, and live in Machida. So I'll be doing this during my free time (while working on my Japanese).
To do proper English conversation, you need at least JHS level English (英検3級以上). If not, I can still help, but it'll be English class and not English conversation.
I usually do any topic for the conversation, with students taking the lead. I will correct some mistakes if they are severe. I'll also give some pointers about English conversation when needed as well.
It's best to bring a notebook for note taking.
You can also bring any material that you want to use for the conversation, as long as it's not dangerous.