Whose calligraphy should I practice? Who can recommend it?

You should practice regular script first. Yan Zhenqing's is good. Beginners should not practice Ou Yangxun Nine Success and Liu Gongquan. These are easy on the surface, but there are many things you don't understand. Then practice the running script, you can practice Wang Xizhi's Preface to the Lanting Pavilion, and pay attention to the change of weight and the break of the pen. If you want to keep practicing calligraphy, I suggest you don't practice thin gold body. Even if you just want to have fun, hand muscle body is just an artistic word. Not counting calligraphy, things that are easy to practice are easy to go out of date. Maybe you just think it's funny. You may not be interested in it after it goes out of fashion this year. A thin golden body can't bring you any real use.