What should I install and projects should I try with proxmox?

I have just installed proxmox and I was wondering what should I do and setup that will help acquire higher jobs or prepare me. So far I have my A+ and Net+ cert and been in the field as a Field tech for almost 3 years. I just installed Ubuntu server and am installing windows 2022 server. Should I mostly focus on setting up a windows 2022 setup and using Active Directory? Just not sure what should I be doing. I guess I could also try kali Linux and look up cyber security projects? What do you guys recommend?