Click on the top right of the scree it will give you options
View profile, Edit Profial, or Log out
1) Click Edit profile
2) Click <span>Preferences
</span>3) Then click "First Name"
4) Then put the name you want.
Answer:
i think it's better if you take a picture of the work so I can understand better, because right now I don't understand what I have to do to try and help you :)