Many people have the misconception that if they will use any expensive microphone, they will sound good automatically. But here isn't the end. It's true somewhere that the quality microphone does matter, but the same does your vocal ability. If you can't sing properly and expect an expensive mic to enhance your voice, it can't. Well, autotune can, but that is a different matter. So No, a microphone can not make you sound better, but it will help you enhance the quality of your voice.