The first step to personalizing your helpdesk is by naming it and adding your website details.
To add information about your helpdesk go to Admin > Configuration > Branding, from here you can also create additional branded Help Centers for different user-facing Help Centers by selecting Add a Brand.
You can also manage the appearance of you various Help Centers in Admin > Help Center > Help Center Design. This lets you change your welcome message, fonts, colors and add a logo to make your Help Center truly reflective of you brand.
For more information about Help Center Configuration and Branding see this section of the Admin Guide.
Or read the next section in this Getting Started series on Creating Dashboards.