(Copy + paste, initially went to post on Reddit but was redirected here)
im new to learning about technology completely. I knew nothing about computers until a few months ago when I took a free course that got me interested in the idea of Linux. problem is, my only computer is a Chromebook. without knowing about the chrultrabook community at all, I found Mr.Chromebox.tech, picked a random Linux distribution (Gentoo), and started taking steps. I did so much research along the way, taught myself what an operating system was, what a computer architecture was, and, most relevantly, what disk partitioning was.
so far, i have removed chrome OS from my laptop and installed a minimal installation CD onto a USB. I can successfully boot it up and access both the Gentoo Linux Handbook and the terminal necessary for installation. I checked for good connection.
ideally, I believe the next step would be partitioning the disks. the tutorial I am following online says to type in “ cfdisk /dev/sda”, after which he gets a menu for different label types (gpt, dos, sgi, and sun). whenever I type that in the terminal, I get “device already contains a iso9660 signature. do you want to remove it?”
I understand what that means on a surface level but i do not know what the best way to proceed from here would be. any advice helps and remember I’m new as FUCK to this shit. the plan with this whole project is to just fuck around with Linux and get comfortable with it until I can get myself a Lenovo thinkpad and take that a bit more seriously.