I am a sophomore. I want to learn calligraphy. Should I learn hard pen or brush?

Of course, hard pen works quickly. If you only want your hard pen to write well and have no higher pursuit of calligraphy art, then you should learn hard pen calligraphy. If you have a strong interest in the art of calligraphy, you should learn from the brush, because hard-pen calligraphy originated from the brush, and the writing and composition of hard-pen calligraphy are all derivatives of brush calligraphy. Brush writing is good, and hard writing is 80% bad. This is called taking the law from the top, getting it, taking the law from the middle, and being the next.