What it means
てはじめて means “only after” or “for the first time after.” It shows that the main event or realization became possible, noticeable, or clear only after the preceding event occurred. The preceding verb describes an experience or change, while the main clause often expresses a realization, discovery, ability, or important consequence.
Usage note
てはじめて emphasizes a significant first realization or experience, so it is not normally used for a simple sequence of routine actions. The main clause is commonly non-volitional, such as understanding, noticing, or becoming able to do something.
How to use it
大学に入ってはじめて、自分で時間を管理する大切さが分かりました。
Only after entering university did I understand the importance of managing my time myself.
大学に入ってはじめて、自分で時間を管理する大切さが分かった。
Only after entering university did I understand the importance of managing my time myself.