初めて

1. Origins, structure, and basic meaning

• Structure: 初めて is read はじめて. It means for the first time, marking an experience or action that had not happened before.
• Basic usage: It describes a first solo train ride and a first experience of trying a particular dish.

2. Common pitfalls and similar expressions

• Before an action
  • 初めて一人で電車に乗りました means it was the speaker's first time riding a train alone.
• Inside a modifying clause
  • In この料理を初めて食べた弟, the brother's first experience of eating the dish leads into his reaction.