It sounds as though you have been teaching a long time, but you don’t say whether you have done any teacher trainings/presentations. If you haven’t presented before you might want to look into some regional or local venues first.
I have developed and presented a little on a local level. Because of my work and family situation I decided not to try to take that farther, but what I found is that developing a workshop or being part of a demo team takes a lot of work. Starting in a smaller market allows you to refine what you are offering before trying it on the big stage. It is kind of like getting a show to Broadway…. Do it in front of a smaller group, get feedback, and get positive reviews to help promote future work.