Today I tutored a class of about 40-50 2nd year university students for two hours. Not lecturing though, just helping individual students with questions while they were doing exercises, but that's plenty scary enough.
I've been worrying about this the whole week, and was more than a little nervous the hours before the session. When I got into the auditorium and saw all the people my hands even started to tremble, which doesn't happen to me very often. But as soon as I got started I somehow quickly calmed down, and I actually ended up having fun! The other tutors were friendly and the students asked easy questions, so it felt like I was actually being useful and not a complete moron.
I'm probably the only one who's going to enjoy these sessions (12 in total) as it's fairly boring work, but to me it's a big step, and proof to me that I've actually gotten better lately. A year ago I wouldn't even think the thought of doing something like this.
The professor wants two of us (there are eight tutors in this course) to do some lectures for the whole class as well, but there's no chance I'm going to volunteer for that. I sense it would do me more harm than good right now. Most of the other tutors said they wouldn't dare as well, which cleared my conscience a bit.