There’s a famous proverb which says “practice makes man perfect”, you can practice only through conversations with people. Try to interact with them as much as possible. Only through interactions you enhance your communication skills and if you lack in confidence then through communication you can suppress your fear. You become self confident through interactions. You can start interacting or practice on your communication skills on a daily basis. Start your interactions from a range that is from social interactions to professional level. Each time you improve your confidence levels.