To update your account settings, click on Settings in the menu at the bottom left corner of any page on Chess.com.
Here's what you can do
Change your avatar by clicking on Change on your picture.
Add your first and last name - This is completely optional.
Add your location, country, and Language. Choosing the language here will affect the language of Chess.com.
Set your time zone.
Add your OTB - Over The Board rating.
Write an About me section to share information about yourself with other members.
Check out this article to learn more about the editing tools: How do I use the advanced editor tools?