If you want to learn, you can look for the classic calligraphy spectrum of famous calligraphers in past dynasties-Yan Zhenqing Diligence Monument, edited by Li Fangming and Long Wenjing, which contains detailed introduction of strokes and methods of stroke movement.
If you practice, you'd better find a clear copybook, such as "Exquisite Monument-Complete Restoration of Strict Style" published by Guangxi Fine Arts Publishing House. The version is extremely clear.