How to hide package from other user (like practice or training user)

Hi,

I have created SAP HANA user for Training or Practice purpose in my organization; given Public by default and Modelling privileges to those users to design attribute, analytic view and calculation view in Training package,

But for user all the package is showing after login in Content (Please note only granted schema is displaying for them), Now how to hide other packages for this user since there is some development package in which actual project information views exits.

And also for this user Security, User, Roles, even all user's are displaying, i don;t want to display security, user & roles as well as other packages.

Please do the helpful. Thanks