Adding an avatar?

So I want to add an avatar because I just have the default profile. However, when I click “Choose file”, and then I click the photo I want for my avatar, nothing happens. My avatar is still the default avatar. I have tried several times, using different wi-fi’s, to do this and it hasn’t worked. How can I get this to work?
Could it be a problem with my computer? (I’m using a Chromebook)

Make sure you scroll ALL the way down to the bottom of your settings menu and click save

Thanks, it’s working! (obviously)