How do you change your leaderboard name?

Just recently got 6k and tried to find myself on the leaderboards website, literally unable to see myself anywhere. Until I realised my name is one I used as a joke years ago.

I've searched previous Reddit threads and can't make sense of their advice, most of them say go to friends tab and select team and pro info there, but I cannot find it for the life of me. Anyone able to help with this?