First go to your wordpress and go to profile. Under profile, go to Nickname. Edit Nickname as needed. After that, you select on Display name publicly as, and you can select new nickname from the dropdown. You can see the result immediately.
I provide tips for local SEO
First go to your wordpress and go to profile. Under profile, go to Nickname. Edit Nickname as needed. After that, you select on Display name publicly as, and you can select new nickname from the dropdown. You can see the result immediately.