The key to learning how to start a small business online is knowing exactly what kind of operation you want to run. Do NOT attempt to find your way as you go.
As simplistic as it sounds, write out your mission statement of your new small business online. "My business is a _____________. Every day we have our customers __________________, and they learn how to _____________ and then they have the opportunity to buy ____________________."
I know. Sounds like a no brainer. But just do it. (Thanks Nike.) Do it and keep it near you when you hit the computer every day. And stick with it because if there;s one thing I know, its that it is VERY VERY EASY to lose your way once you get started surfing.