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.

You can start a COLLECTION.
The Big Bang Theory Season 11, Episode 9

Can I interest you in a topical steroid
from my lotion and unguent COLLECTION?
The Big Bang Theory Season 4, Episode 6

but a COLLECTION of choices?
Westworld Season 2, Episode 9

We're going to Oliver's house to see
his COLLECTION. Wanna go with us?
The Big Bang Theory Season 8, Episode 7

What if we reposition
the COLLECTION tank?
The Big Bang Theory Season 2, Episode 22