Hello Françoise! I think it's a question of practice - the more you speak in public, the easier it gets. I used to think that everyone was looking at me, analysing the way I was speaking, and that made me nervous. But after a while, you realise, that people aren't doing that, and that they are really just listening to you and paying attention because they're interested in what you have to say, which is nice. I'm glad to hear that you are getting better with public speaking, and let me say that I am impressed with your English here!