Why can't I dowload apps on my Galaxy Samsung A5 mobile?

[Babis]

Hey!
I have a new Samsung mobile and I only have a Galaxy App were my son can dowload games but I can't download Facebook etc. I also have a Google Play app but when it's installed I can't find the app I just downloaded.

 

[anon8380037]

You should have a Play Store app already on the phone. Have you opened a Google account.
It may be hidden on the Google folder of icons.