The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

So you want to hand
them the INITIATIVE?
Vikings Season 1, Episode 7

Initiative.
Yes.
Breaking Bad Season 2, Episode 7

l merely took the INITIATIVE.
Breaking Bad Season 4, Episode 8

We're with
the Argos Initiative.
Westworld Season 2, Episode 2

Because it's not our territory?
Because we lack INITIATIVE.
Breaking Bad Season 2, Episode 7