Old template settings

Hi everyone, i installed a new Themeforest in to my website but i cant get the customize options of this one, also get the olde settings about twentyseventeen oldest theme and cant get started all the new theme options, Does anybody have any suggestions. Thanks !

In themes option . select your desire template and activate it first

I did but the oldest theme data does not let me see all the editing options
of the new theme.


I need to install my new theme with the demo content that comes with the
default, according to “Your expert will install any demo content that is
included with your theme. However, this doesn’t guarantee that your website
will look exactly like the theme’s Live Preview.”

Could you help me?