As an admin, you will need to approve only an order the status of the payment is a record as pending
User will create his order from the user side and admin will get a notification to his mail and on the dashboard for a new order that has been done
example of pending orders can be displayed on this example:
Update order status:
You can change the order status on the right bottom corner by choosing the status and add your comment and add the history button.
The user will be updated at the same time and his order will be updated according to your setting.