Do you need technical expertise to install and run Bitnami for Wordpress or Drupal?
No, you don't need technical expertise if you're working with Windows or OSX. For Linux, things will require additional instructions in order for the installation to complete successfully.
Use the following website to download the packages: https://bitnami.com/stack/wordpress/installer
Also, check the documentation available in case you will need help: https://bitnami.com/support