What is the complete workflow of a sale?

How to perform sales order in tryton ? please explain in detail here like how we can add product, and how invoice is generated, how receive payments from the customers and how shipping functionalities is working here.

You should start by reading the documentation:

https://docs.tryton.org/latest/modules-sale/index.html

Then ask your questions if there are some things that you’re unable to do.

You should also create new topics (in the appropriate category) when you have a new question.