How do I update my account information like display name, username, phone number?

On the Home tab, go to your profile by selecting on the 1st row.

Tab on the Settings button below your avatar or from the menu button on the top trailing corner of the navigation bar.

You'll see the "Account" section where you can update your email, Display Name, Username, and phone number

Go to your Account Settings page by clicking on the Profile button in the top trailing corner of the page header.

You'll find all Account and Subscription management functions here.