You list an education qualification in your post which has nothing to do with your stated intention. Yes, you’re learned and probably smart but why do you want to be a sysadmin?

Have you ever coded anything? Do you want to learn that? Do you want to use your humanities degree to be a caring supporter of stupid system users? Are you even aware of the credo of the bastard operator from hell?

Sorry…saw your post and just wanted to take a piss…you’ll be fine if you want to do that but it’s probably not just like “installing linux” on a computer.