Sounds like fun.
I've never addressed 150 students, but I have addressed classes of 25 students 6 times.
Does that count?
Our local college has a speech and communication department and they have a program in MTF voice feminization.
Partly as practice, partly as education the clients speak before various college classes.
Some of the classes are on speech disorders, some are on counseling.
All the presentations have been well received.
We have another Monday morning.