Also, in the future I suggest looking through the Forum Discussion & Info board. There's several threads asking about this exact thing, most of which contain the information I provided above. It's also in the FAQ Thread that's pinned at the top of this board.
Best wishes on getting a new moniker that suits you!
I want to change it but I don't know how. I asked this before but didn't get any answers.
Please create a support ticket asking for your name to be changed: https://www.minecraftforum.net/meta/support
Also, in the future I suggest looking through the Forum Discussion & Info board. There's several threads asking about this exact thing, most of which contain the information I provided above. It's also in the FAQ Thread that's pinned at the top of this board.
Best wishes on getting a new moniker that suits you!