Hi,
Only way to break fear is "Fear your Fear". Stage fear is common either you are from village or from city. A persons knowledge and confidence level is all that matters.
If you are knowledgeable then confidence automatically attaches. If you are confident, then you will crave for knowledge and have urge to succeed.
Simple... Whatever is your topic, be well prepared, practice once or twice with your home mirror or your close ones, be receptive to criticisms, be ready for question (thats means be strong in what you deliver), check accuracy of data once or twice, record yourself and hear yourself, self analyze your mistakes, keep track of your body language.
Thats it you will do great.
Radhika