Rinse and Repeat
Once you have created your first widget, its just as easy to add another. Add multiple widgets to a single container, or add multiple containers to multiple rows for a more complex page layout.
Its up to you.
There are many widgets available, they are provided by active modules in your system, so adding new modules could result in more widgets becoming available.
Click on the menu on the left of the Add widget interface to bring up the dialog for adding that widget to the page.
Each widget will have its own dialog interface with options to choose from.