It’s been a while since I installed arch manually, but wouldn’t that only help you understand a bit on disk partitioning and some basic commands like copying files/chrooting? You generally learn that stuff the first time your install breaks on any distro
I’ve found it’s kind of a gamble on whether you have a cool manager or not. I have “unlimited” vacation and a chill manager and tend to take 5-7 weeks off a year which is quite high for a mid level programmer in Canada.