To hide your helmet or other type of headgear, open up the settings from the main menu.In the gameplay tab, scroll down to the very last item in the first category, before the building tab, where ...

To unlock fast travel in Dune: Awakening, you'll need to meet an NPC who is pretty hidden in a side quest. You won't be taught about fast travel in the game's main introductory quests, surprisingly.

To hide your helmet, simply toggle the Show Helmet option in the settings tab. Here’s how to do so: Open Settings and go to the Gameplay tab.