Click the Settings Icon
Under "Your Information" click to "Change my name/picture."
There you will have two options: a) Upload avatar b) Take a Selfie -> click on "Update" and you are set!
To keep the platform as authentic and real-time as possible, we recommend taking a live image with your camera. If you do not like the picture you took the first time, you can update it.
If you do not have a camera connected to your device, you can upload an avatar/profile image instead. To make sure it is not distorted, the photo should be square.