"Now what" after installing

[mglaman]

We have a Getting Started -> then Installing. However, it is like experiencing hitting a brick wall. We should help people transition into the rest of the docs.

[mglaman]

This should link to parts of the user guide and developer guide

[ryan-hovland]

One thing that would be helpful as a complete newbie to Drupal is an explaination of how to do common tasks that are present in other shopping carts. Like categorization, displaying lists of products, making menus, etc. Not exactly spelling out all the steps but just saying "Categorization is handled by taxonomy, here's an example structure and the user guide page to get started"
Pretty much how to translate ecommerce tasks into drupal ones