You can easily edit your name or profile picture by following these steps:
First, navigate to the Profile tab.
If you want to change your name
Tap on your name.
Edit your name
Tap on “done” on the keyboard or everywhere in the screen outside the name field.
Here is a video that shows it.
If you want to change your profile picture:
Tap on the picture/Avatar above your name.
Take a selfie or upload from your photo’s library
If you like it, tap on “I like it”. This will confirm the change of your profile picture. Otherwise, you can tap on “Remove current photo” and select another one.
Here is a video that shows it.