Grav Install admin

Hi, i try install grav on my website with apache, i'm use the grav-admin package but say "Not found /admin" and the content of grav-admin/ not appear a admin folder. I probe install only admin package and i see the message in the web "installation successfull" but i need the panel administrator. How i can install this panel.

Where are you hosting the site? What folders do you see in your main, root folder?