Hello Chris,
You could either use the widget, if your frontpage supports widgets.
You can also use the shortcode for the widget-layout: [gwolle_gb_widget]. The readme has parameters listed that you can use.
You can also use the standard layout of the list with the main shortcode: [gwolle_gb_write]
About styling for the buttons, could you share the address of the website and explain what you want? I can try to write some CSS that might be fitting with the rest of the website.
Regards, Marcel