First of all try to overcome the stage fear, some people can act very good but they fail to prove themselves due to fear. To over come fear try to practice acting infront of your family members, friends, relatives. And join at any reputed acting institutes where you can learn more acting skills, emotions etc.
You can find many acting institutes in web. Search for good institute and join and improve your acting skills. And try to make some short films with the help of your fellow learners and post in youtube. So that you can build your own audience. And can get film chances. All the best