It's okay if you don't have any formal tutoring/teaching experience. If you have informal experience (helping your friends, family members, etc. with certain subjects and/or presenting topics for a class presentation), you can still bring that up. Don't worry too much. A lot of it is making sure you know your stuff (whatever subjects you've chosen to tutor for) and just being able to communicate and articulate well. You may get asked to go through a problem with them or explain to them a particular concept or something. It's really not that bad though. Haha, if you've gone through med school interviews, these are pretty much a breeze 🙂 Good luck!