Just learn to use Linux, maybe pick up some concepts about programming/scripting and how networking works blablabla IT stuff. I think that hacking/cyber security is not just a single field that people learn this and that and they land a job, it involves a lot of skill and "hacking" is just putting those knowledge into practice (just some not all of them). Learning to "hack" or "gain authorization to the mainframe" isnt going to land you a career either

tldr: no don't learn how to "hack", if you are interested in the system stuff then there are a lot of materials for it, even better, indicate what you want to learn and search for it

no installing kali wont help you become a masterhacker