how can i improve in this area?
No Worries, Perfect practice makes Perfect result :D
A new essayist, like me, who learns IELTS, spend hours thinking of some "perfect" sentences to be a hook.
I rarely write the hook sentence first, but last. Yeah, seriously though
After writing my essay, I always go reading the whole essay, up and down.
Then, start creating a hook sentence, which is short, but interesting.