In order to really start to "fit in" when speaking with Westerners, it is good to know some useful idioms and phrases.
Here is one to start you on your journey.
When people are very happy about something an older phrase that some people still use is "over the moon".
ie Trevor and Samantha had a baby! Trevor is over the moon about becoming a father!
https://idioms.thefreedictionary.com/be+over+the+moon