Check the link below. It is called 'google play' here. But should be called 'play store' on Samsung phones.
The icon picture to look for is on the link.
Yes OG. But this involves altering settings. Souxie has stated that 'I am not techy minded'
So probably best to stick with what is safe and already installed.
in order to download from playstore you must have a google account
like gmail for example, if you dont have one, set up an account
https://support.google.com/mail/answer/56256?hl=en-GB
then you can use that login, and password for google playstore, in order to download apps for you phone.