If you are an open person, you can practice Yan Zhenqing's Yan Liqin Monument, Duobaota Monument and My Nephew Memorial Draft (in block letters).
If your font is introverted, you can practice the inscription of Liquan in Ou Yangxun Jiucheng Palace (block letters);
If your handwriting is delicate and slender, you can practice Liu Gongquan's Mysterious Pagoda Monument and Shence Army Monument (in block letters).
If you are cautious in writing, you can practice Zhang Xuan's epitaph and Zhang Menglong's tablet (Weibei).
And Jing, I don't know. My calligraphy teacher recommended it to me (in block letters).
If you practice well, you can practice running script, such as Wang Xizhi's Lanting preface, dragon copy and Dingwu copy.
I really couldn't make up my mind, so I practiced Yan Ti, because Yan Zhenqing left many words. But Yan style is not good for excessive calligraphy, while European style is good for excessive calligraphy.
All the above are published by Cultural Relics Publishing House. I don't know where to buy it. I bought it from my calligraphy teacher, but I think you can search online.
That's all I know, I hope I can help you!