Have you got any lighting equipment as of yet? Does the camera have have a mic input. Is this interview for home use, or will you need it for other purposes.? Do you have some type of local video or camera rental house that has lighting available? Will the shot be a full length, waist up, or a typical close-up of the head and shoulders? What time of day will this be taped? If during daylight, is there a large window that can be used as a main light source?

Let me know and we'll see if we can help you out.