There is no payment gateway or merchant account required. The way in which you receive payments is totally up to you. You can collect cash over the counter, accept COD or use a QR Code or Yoco. Its totally up to you. Be sure to set out clear instructions when setting up your https://instaorders.co.za store.
Is there a dashboard available?
Most certainly. You can easily manage products, catalogues, payments settings, prices etc through your dashboard.