Which brush font is suitable for girls to practice?

It is recommended to start with regular script and running script, or you can start with official script. As for the gracefulness, elegance and beauty you mentioned, you can take a look at the following posts:

Regular script:

Wang Xizhi's "Huang Ting Jing", Zhao Mengfu's "Dengba Stele", "Shou Chun" "Tangji"

Ring script:

Wang Xizhi's "Lanting Preface", as well as the running script of Cai Xiang of the Song Dynasty and Zhao Mengfu of the Yuan Dynasty are all beautiful

The official script is The most beautiful one is "Cao Quan Monument"

These are more suitable for girls to practice. You can search them on Baidu Pictures according to the list I gave you