You can change your name by following the steps below;

1. Tap on the profile image at the top left corner of the home screen.
2. Tap on the "Edit" button at the top side of the screen.
3. Tap on your name to write a new name.
4. Rewrite your name to confirm.

Important Note: You can change your name only once after creating it. It won't be possible to change your name again once you've changed it.