I guess my end goal is to be able to comfortably install and use arch Linux with my own customization’s and be able to fix it when things go wrong.

What tips/ideas do you have for getting better at navigating the terminal, and getting a better understanding of how the os works. What is a good roadmap to follow? And how did you, advanced Linux user, get to the stage your at now?

You learn by doing and by failing. Like we learned to walk, to write, to drive, to kiss, to speak a foreign language, or even to lace our shoes (and, yep, even that was a heavy trial and error process for toddler-us back then).

• Install Arch (in a VM, maybe) and while doing so read the Arch Wiki to understand each step, each action and the role of each app you’re asked to install. The Arch Wiki is an impressively well done documentation.
• Be fine knowing that it will take time to learn anything new (not just Arch, anything), you won’t get good at it the first time. Don’t rush it, take your time.
• Be fine knowing that you will face issues and will most likely fail at some point, be it to instal Arch or in doing whatever new. There is no other way to learn, for all of us, than by failing and then trying again, over and over. Once again like we learned to walk (by falling on our butt), to lace our shoes (by making a mess) or to kiss (by not doing it great at first).

Learning takes time and efforts. Perseverance, and humility. There is no shortcut to learning anything that is worth learning, not just Arch. But the reward is also so much worth it. Einstein had to learn calculus, Da Vinci had to learn how to hold a paint brush, and Tolstoy like Flaubert had to learn to write and I’m willing to bet they all made mistakes while they were learning their respective craft.

Even without referring to geniuses: the first time I tried to install Arch I ran away screaming and swearing I would never touch that thing again. The second time, I had already managed to read a good chunk of the relevant part of the wiki and used it constantly at each step of the process. I still failed at it but at least I understood why I failed and I felt incredibly more… in charge, despite me failing. The third time, I managed to have it running, and to install most the packages I wanted. That was great. There was no fourth time as, as much as I love Arch (which is a lot), I quickly realized using it that constant updates were not what I wanted from my OS and apps (I’m an old-ish user with very basic needs, I’m not even that much of a geek to be honest). So, I switched to the complete opposite of Arch (Debian, another great love of mine I must say). Still, learning and using Arch taught me a lot about Linux in general and about… myself.