你寫的不錯，只是”had just graduated" 或 “only recently graduated” 比較 “Although she recently graduated” 適合，是動詞時態的問題。 You can say: Although He Shanshan had (only/just）recently graduated from school, she still wasn't daunted by lack of experience. other variants: Although He Shanshan had only recently graduated, she (nevertheless) was unfazed by her lack of experience. Even though He Shanshan had only recently graduated, her lack of experience did not worry her.

Is Shanshan the name of the person ? Then you will say "Although Shanshan had only recently graduated from school, she wasn't daunted by the lack of experience"