how can I customize Andriod interface?
Even in your pre-installed launcher you can remove apps from desktop (they will not be uninstalled from your tablet), sort them on your desktop any way you wish and add so many app icons to your desktop(s) how much place you have. Make a long tap on an icon and then you can move it or delete from desktop. Make a long tap on an icon in app drawer and then you can add it to your desktop.