The steps, in order, with nothing implied that Koovira does not do.
Four or five steps, and what each one actually does.
Answered plainly, including the things Koovira does not do.
No. Invoices, customers and sales figures are private to your business account. Nothing on this page shows real transactions.
It follows the GST configuration on your Koovira account.
Yes — that is what the staff permissions are for.