Your fashion accessories might be limited, but there is one accessory every interview automatically has: their background. Like accessories that you wear, the space that you have chosen to be interviewed in says something about who you are. Keep it simple, so that the audience is focused on your message, not the superhero figurine collection on your shelves.
That said, you don't want your background to be boring, like a blank white wall. Go for something tasteful like a bookshelf, or a cared-for house plant (not a dying one so much). Be sure to avoid anything in that shot that is personal, like a bed, or something potentially embarrassing like dirty laundry.