"When I first started working I felt that I was inexperienced."
- "When I first started working I felt that I was inexperienced."
"When~" 「〜時は」
"I first started working" 「初めて会社人になった」
"started working" 「会社人になった」"joined the company" も使えます。
"I felt that I was inexperienced" 「未熟だったなあ」