Login
Login to the backend
Order
To check orders go to woocommerce->orders from left hand side
Order Status
To change the order status click on particular order and change the status
Check below Screenshot for reference.
Order Actions
To perform different order actions such as send invoice, new order notification click on order action and select particular action and click on update. Note: Only do this if required. By default this will automatically work.
Please check the screenshot below for reference.
Payment Status
To check whether you received payment or not you can go to https://razorpay.com/ and check the status over there.
Customers
You can check all the customers go to woocommerce -> customers