Im a teacher!

So I started helping out on Sundays at my parents church. Helping teach the 4th through 6th graders. I co-teach with this girl thats about 3 years younger than me, but she has been teaching the class for about a year now.
I also agreed to help out on Wednesdays nights at my church I go to now, or was going to but I only hang out with my small group for bible study and go to my parents church on sunday.... Its complicated. Anyway I was told this past Wednesdays that I will actually be teaching the 3 year olds. Instead of just helping out the teacher. It is sad that our church is growing but we can't seem to find anyone that wants to help teach the little ones. I said I would do it. Its just that I have never taught before so I am a little hesitant. But I am sure I will do fine. I mean they are 3 year olds whats the worse that could happen.... oh crap...