My associate Sims Wyeth always gives great advice.
If you are familiar with my speech model I suggest before you start you need to "answer the questions in the audience's mind.
Speak their thoughts before they do
“Every word uttered evokes the idea of its opposite. “
In other words, when you assert your opinion, your listeners will reflexively search their own minds for a thought that could prove your idea flawed. To take the wind out of their sails, and to demonstrate that you have considered other perspectives, speak their thoughts for them, and explain why your idea is superior. In this way, your talk takes the form of a dialogue between your proposal and reasonable objections to it. You will be seen as credible and balanced, and your listeners will be more likely to agree.