There are 4 compulsory operations before we start using system.

1.  Complete  "Company settings"

2.  Complete  "Freight settings"

3.  Create products to system. ( Create a single product  or Import products by CSV file )

4.  Create customers to system. ( Create a customer  or Import customers by CSV file )

After you completed system initialization,  you may want to know:

E-commerce website initialization

Creating your first sales order

Creating an invoice