Change profile picture for admin

How do I change my profile pic so when I reply to comments it shows as Financial Freedom Countdown with my pic instead of a default gravatar pic.

See comment on this page as an example how-bad-will-the-coronavirus-covid-19-recession-get/

I also tried creating another account to reply to comments. I was able to change my profile pic there; but when I reply with that account my reply to a comment is shown as new comment and not nested below original comment.

Hello there,

Gravaar rofile picture is asociated with the email address you used to register on Gravatar. To change your displayed profile here in the forum, you may change your email address which doesn’t link to any Gravatar account.

aThemes Support