For example, Zhang Qianbei, Shi Chenbei, Cao Quanbei, Book of Rites, Yiying, Kong Zhou, Chaohou Filial Piety, Shimen Ode, Haowang and so on. Whichever style you like will do.
Running script can be selected from Preface to Holy Education, Running Script of Mi Fei and Running Script of Wang Duo.
Wang Xizhi's Preface to Lanting Collection, Wang Xun's Yuan Bo Post, Ou Yangxun's Zhang Hansi's Luji Post, Yan Zhenqing's Sacrifice to My Nephew, Liu Gongquan's Zhao Meng Post, Yang Ningshi's Jiuhua Post, Li Jianzhong's Mutu Post, Su Shi's Huangzhou Cold Food Poetry Post and Huang Tingjian's Songfengge Poetry Post.
No matter what kind of copybook you choose, it is the most important thing to keep learning, be good at thinking, work hard, keep practicing and achieve something in the future.