The first and foremost step is to Investigate the E-Commerce area you are interested in and make some decisions regarding your specific business.
Once you are up with the plan, the next step is to choose the name of your business that is Unique but Clearly Indicates what your Business is or does. Along with that decide your Business Legal Structure.
Apply for an Employer Identification Number for your E-Commerce setup. Although not all Business entity requires EIN, it helps you separate personal and Business Finances.
After you have Applied for EIN, you will have to Obtain Business Licenses and Permits that are needed to operate legally within your city or state.
You will start Creating your Website and Online Store that will be the Face of your Business because this is what your Customers will see first.
After Creating a Website, you have Almost Reached the end of the Procedure. Now you will need to actually Source the Products you are going to sell.
Now that you have Successfully Built an E-Commerce Website, you are Quite ready to serve your customers. In order to do this, you will need to properly market your E-Commerce Platform.