I want to speech very well in front of public.

I am going to announce speech next week. Frankly, I am very worried about that because it will be a first experience which addresses a topic in front of foreigners, not Korean. I still do not choose any kinds of topic, and I have a anxiety about how I can speech very well. I have a little stage fright, so I will practice the speech so much in order to get over the short my speech.