Think of a product idea and make a detailed schedule. Then you should search for investors and promote your product. Start selling it. 
If you're lucky the company gets bigger.

But you seem really interested in an answer. Just to look at your last four questions:

"Starting online business is easy to do?"
"Starting online business is easy to do?"
"What is the way to start a business?"
"What is the way to start a business?"

No, it wasn't me accidentally pasting the title two times each. He just asked the same question several times.

Starting a business is not easy, but also not difficult as long as we want to do it. To start a business you must have the ability, including: business management, financial management, marketing and expertise. Self-evaluation needs to be done to assess what resources we have to do a business.

Before doing a business you need to make good business planning. Prepare your business plan systematically. Apply discipline in every step of your business. Perform regular evaluations of your business. This needs to be done to assess the extent to which business developments we are undertaking, what challenges we face, and what solutions for the future.

Perform market analysis of the production you want to market. Make a marketing promotion well. Apply innovation in all areas. Do not forget to monitor the development of other competitors. This is done so that we do not miss in grabbing consumers.