Hi @Wiseman,
There has been few discussions about random items (mostly, random quotes) in this forum which you may find with a bit of searching. Take a look at this great explanation written by Victor! : Randomly display a record (quote) on a new screen - #2 by Victor (I’m using the 2nd method in an app for show different quotes but if you want to avoid duplications in this method, that’s another setup.)
Thank you and have a great day!