Calligraphy may give you a serious impression. It´s one of the Japanese traditional arts but it´s not necessarily difficult. It´s a very simple art, using a brush and a black ink, then you´ll realize with these two instruments you can express yourself so deeply. It´s also a training of how to connect your mental image to your fingers. While you are trying to reflect the picture in your head into a blank paper, you realize your mind totally clears up. So it´s like a meditation. This is calligraphy. If you don´t know Japanese, don´t worry. That is not the priority.