I would be very doubtful whether all seven children would ever take to me. I wouldn't feel adequate to take over so much responsibility ——I simply wouldn't dare. But at twenty you are beautifully unconscious of possible complications.
take to ~:~になじむ、~を受け入れる、 ~が好きになる adequate:(形) じゅうぶんな、適切な、 complications: 紛糾の種、 複雑な煩わしいあれこれ unconscious of ~:~が気づかない、 ~を意識しない possible:これから起こるかもしれない possible complications / 今後生じるかもしれない様々な苦労