Vesta Control Panel gets installed with other software as well.
After the installation is completed, it will show you the username and password and the place where you can login. It will throw an error of connection not secure. Just click on advance and click on add exception and you will be able to browse the website.
After you login, click on the admin at top right and change your login password, change default name servers and save.
Click on the Server from the top menu, and then click on configure. Here, you can change the hostname, time zone, and default language. You can also configure many settings of other services that are installed.