By default the basic DuckDuckGo URL prioritises the USA, hence the reason you're seeing US sites dominate. If you click the three horizontal bars at the top right of the DuckDuckGo home page) you will open a menu on the right hand side, like this:
Click on the "All settings" option and you will get a page like this:
Select your preferred region, and any other settings you prefer, from the drop down options, then either click "save" in the cloud save box to the top right, or you can click the "Show Bookmarklet and Settings" button and that will show the custom URL for your personalised settings.
If you set that url to be your DuckDuckGo bookmark then every time you open it it will load with your custom settings for region, language, advert preferences, etc.
All of the settings on that page can be stored in a bookmark this way. This avoids using the cloud and allows to load your settings anew every time your device loads the DuckDuckGo home page.
Both save options work the same way - use whichever you prefer.
Let us know how you get on.