What part about this is bothering you? Is it standing in front of a group of people or preparing something for them or maybe fear of the unknown? See if you can figure that out, cause there's something about this that's really eating at you.
I love the idea of calling many friends to take the class so you will know some of the students. They will encourage you during class. I really think you'll do just fine. Have faith! You'll realize after class that there's no other place for you than heaven. :)