Dear Mei ,
Thank you for telling me that you will take part in an English Contest. It is a good way to show how fluent your English is .And it is also normal to feel nervous to face such situation .But I think you must be confident,which will make you more brave,more easy to make your dream come true.So don't be afraid to tell this competition to your family and friends, who will give you a lot of support and courage.Speak out, my dear friend ,I believe you are the best!
Jack