Hangouts. I was never able to dial a number and place a call
Yes you need to download hangouts dialer and google voice. A total of three apps, sounds crazy but worthwhile, doesnt take up much space, keep only the hangouts dialer to make calls and texts. Meaning the other two apps you don't have to make an icon on the home screen.
And then when you managed to figure out how all this works you can use a feature called outbound caller ID which allows you to use your American phone number which you have in the US to make outgoing calls meanwhile people thinking you're back in the US calling them it's great so people know who you are instead of using a Google Voice number.
While with that you might need a little help as they made an update for the app which took away that feature, which requires you to download an APK file of an older version of the Hangouts app version 24 and then redownload Hangouts dialer which would allow you to verify your number, I can walk you through the steps later after you get your regular Hangouts working.
You would use something like apkmirror.com to download that but don't worry about that for now.
It sounds complicated but once you get everything up and running it's very easy.