The everything install includes kerberos and its tools, so yes, its relevant…
You can start with the default Kali ISO and then after a successful install, add all the other tools if you want or need them from Kali tweaks menu, so that would certainly be an avenue.
a kerberos realm is a domain address like ‘mydomain.com’ so if you have only been using a single word, it will later fail.
brief info here about setting up kerberos on Kali just so you know what its looking for, but this is clearly after Kali has already been installed;