When it comes to Liu Ti's best copybooks, we have to mention his regular script copybooks: Liu Tang Gongquan's Shence Army Monument and Liu Tang Gongquan's Mysterious Pagoda Monument. The font of the mysterious tower is hard and thin, which easily leads to too skinny when practicing, while the font of Shence Army is slightly more atmospheric than the style of the mysterious tower, so I think the latter is more suitable for beginners. Of course, if you want to learn Liu Gongquan's copybook, you must first learn to write.
This may be redundant for the master of calligraphy, but it will be a very necessary step for beginners. Finally, I tell you that the process of calligraphy learning tests the patience and perseverance of learners, so everyone should pay attention to a patient stroke when practicing calligraphy.