I am trying to create a site, but there are no templates

Templates must be installed and shared before you can create a site.

The templates provided with Oracle Content and Experience must be installed and shared by an administrator before you can use them. Contact your administrator.

Similarly, when you create a template, whether by importing, copying, or creating from a site, the template can’t be used by anyone else until you explicitly share it.

See Configuring Site Settings in Administering Oracle Content and Experience.