Summary
Drupal is a complex software platform, and while you may experience no problems at all when you build your first website, you may need to reach out for help. The Drupal Community is a very welcoming place, and you should be able to find the help you are looking for through one of the many channels discussed here.
As with any technology, there are no stupid questions. It's important to remember that everyone is learning all the time, and Drupal itself is evolving every day.
Enjoy building your projects with Drupal and come back to this book as reference when you need to. There are lots of people in the community ready and willing to lend a hand if you need them.