From here, you can continue with any or all of the following:
Create user accounts
Configure your site
Add content to your site's front page
Create courses
You can do these in any order, but I usually use the order presented here. And don't be intimidated into thinking that you must get all of these correct or right the first time. They can be changed and edited at any time. So, start with whatever you're most comfortable with, develop some momentum, and build your learning site.
In the next chapter, we'll cover how to configure your site to create the kind of environment and experience that you want.