Ask for some hard pen calligraphy works. (regular script)

I suggest you find some calligraphy works with small brush and small font to practice hard pen calligraphy. Learning calligraphy is not as good as learning ancient inscriptions, especially the opening method. Only by learning from each other's strengths can we gain more from high standards. For example, Zhong Shaojing's Ling Fei Classic, Zhong You's Epiphany Watch, Wang Xizhi's Huang Tingjing, Wang Xianzhi's Thirteen Lines of Luo Shenfu, etc., all depend on your favorite style. I hope it helps you!