I noticed it is using my first name and I would rather have my username be something else..
I just went through this. while you will find help articles indicating you can change; likely you can not. a Mod will likely send you a PM and ask you what you would like your name to be changed to.
You can try going to your "Account & Privacy Settings". There is an icon to "edit" your username; but if similar to my scenario; you will see a message you do not have the rights to change what you would like the entire support community world to see.
It would seem to be a basic security principle to allow users to define what they wish their public Identity to be.
What would you like your username changed to?
Yes I should like it changed from Carole to ganma98
Your username has been changed to "ganma98".
Have a wonderful day!