If you have the Change Nickname permissions in the server, you can now officially choose a new nickname! You can change your nickname using a couple of different methods in the server!
HOW TO CHANGE NAME ON DISCORD HOW TO
If you're a server member, you'll need to have a role that has the Change Nickname permission in order to change your own nickname in the server! Note: If you don't have this permission, double check with the server owner or administrators to see if they can change your role's permission settings! How to Change A Nickname