The easiest business to start will require little capital, but more of your time to make it work. And not surprisingly, most of them are in the digital ecosystem. They include:
Blog publishing
Graphic and web design
Online courses and coaching
Business consulting
Becoming a virtual assistant
Basically, you can take any skillsets you have and transfer it to a digital format to start your business with greater ease. You can use this skill set to run a business or teach what you already know.