Unfortunately, for now, you are stuck with the stock icons as you cannot change that avatar.
This is already an open feature request for this (you can vote for it and watch it if you want to receive notifications when there is an update):
Online forums and learning are now in one easy-to-use experience.
By continuing, you accept the updated Community Terms of Use and acknowledge the Privacy Policy. Your public name, photo, and achievements may be publicly visible and available in search engines.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.