Linux

Install it in a VM. Create snapshots. When you fuck it up then revert the snapshot.

Once you're decent at figuring out what to and not to do then try to get proficient at file system snapshots so you can do the same thing more or less on bare metal.

Use btrfs with snapshots. Verify you know how to boot into snapshot after a failed update and repair the system. This is the most important thing and lets you experiment much more freely.

Make sure you put "by the way I use arch" at the end of all your posts

Start from the install guide on the wiki. It'll branch out fast and just follow all the links and read. If something goes wrong, check if you missed something on the wiki. It's an amazing resource.

Also, look up your hardware on the wiki before you start.

I wish I new how to easily install an AUR package manager when I first started.

Step 1: go to the AUR and choose a package manager. I recommend paru, but there are plenty of others.

Step 2: install git using pacman

sudo pacman -S git 

Step 3: copy the git clone URL for paru and pull it

git clone https://aur.archlinux.org/paru.git

Step 4: CD into the new directory

cd paru

Step 5: install paru

makepkg -si

Now when you find a package from the AUR you want, you can easily install it.

paru -S [package]

Also, when you update your system, you only need to run paru -Syu. You don't need to run both pacman -Syu and paru -Syu.

• ALWAYS avoid partial upgrades, lest you end up bricking your system: https://wiki.archlinux.org/title/System_maintenance#Partial_upgrades_are_unsupported
• The Arch Wiki is your best friend. You can also use it offline, take a look at wikiman: https://github.com/filiparag/wikiman
• It doesn't hurt to have the LTS kernel installed as a backup option (assuming you use the standard kernel as your chosen default) in case you update to a newer kernel version and a driver here or there breaks. It's happened to me on Arch a few times. One of them completely borked my internet connection, the other one would freeze any game I played via WINE/Proton because I didn't have resize BAR enabled in the BIOS. Sometimes switching to the LTS kernel can get around these temporary hiccups, at least until the maintainers fix those issues in the next kernel version.
• The AUR is not vetted as much as the main package repositories, as it's mostly community-made packages. Don't install AUR packages you don't 100% trust. Always check the PKGBUILD if you're paranoid.

I wish I knew then that debbie does the trick for me

be patient. read thoroughly. be open to a learning experience

Make backups of your important files, or use a separate home partition. When I used arch, more than once I had a bricked install after doing updates. The last straw for me was when after updating my network completely went out. I switched to fedora and haven't had issues for 2+ years. Also, (this goes for every distro, but more so arch than others) NEVER update if you don't have at least some time in front of you in case something happens. Arch was definitely a good learning experience and it was fun at first tweaking everything, but the drawbacks in stability got a bit old after a while. The AUR is a godsend and it's the best thing ever, you should also be using an AUR helper like Yay to make your life easier.

The archinstaller script is pretty good if you're just needing a basic setup. Ive been really happy with a btrfs partion from the recommended disk layout, then using btrfs snapshots + grub bootloader to load from snapshots. You can also create a hook on pacman so that you create a snapshot when you upgrade packages.

Since you didn't mention your experience, id recommend looking at the various desktop environments so you know which one to pick during install. You can ofc change later.

And read the arch docs. They are very good and have a lot of time invested into them. If you find you don't have the patience to read them then you're probably going to want to look at a different OS. Good luck!

Read https://wiki.archlinux.org/title/System_maintenance before you go your first pacman -Syu

And when people tell you that you shouldn't use aur helpers like yay to blindly install/upgrade aur packages, there's a reason for it. Read the PKGBUILDs.

Those who are (wisely) suggesting snapshots, do you guys use a different partitions for data and OS? Because if you do revert to an older snapshot after a while, you'd loose new data, too (unless you recover it from current state)?