Hi,
Where did you get phone from?
Try going settings Apps
Look for the playstore app
And clear cache and data
Check signed into Google
And go phone settings
Accounts and Backup
And sign in Samsung account
Go apps playstore
Settings
Click on about
At the bottom of the page
It should say Device Certified
If not it mabe why
Google won't update
What to do if Google Play Store will not load or download apps
https://www.samsung.com/uk/support/mobile-devices/what-to-do-if-google-play-store-will-not-load-or-d...