You can navigate to Settings either by clicking the cog icon in the left navigation bar, or through the account dropdown on top right part of the page. There are several subsections of settings page. There is General settings subsection to change platform language.
In the Account Settings subsection, you can edit your name, surname and username.
Additionally you can reset your password and email. When you login with your shop domain, you will need to set a new password just for the first time. You won't be able to login via username and password unless you set a password from this section.
And the last but not least in the Integrations subsection you can observe users' recent customer activity