I've never given a sermon, but have written two (and a half) sermons, what with the plays I've written for my church. Also, I'm very nervous about leading prayer (but have done it once)...

I think I'm dithering, so... I'm a firm believer in "Take Three Deep Breaths And You Can Do Anything", and the importance of speaking the truth as you see/feel/believe it. John F. Kennedy writes about the importance of this in Profiles Of Courage, and taking a look at it -if you have time- might be helpful.

Hope something in here's helpful. And good on ya' for speaking up.