It shouldn’t break if you just install packages from the main app installer. It’s more of a concern if you’re trying to install anything from source.
Also make sure to try a live cd or live USB to make sure the OS is compatible with your hardware. VM is not sufficient for this last one. This is usually only an issue if you have very new hardware.
I would get comfortable with the idea of breaking things. Make regular backups of your data. The best that I’m aware of for making it easy to work backwards from breaking things is NixOS, but I wouldn’t consider it beginner friendly.
You learn a lot from trying to bring a system back online. But it depends if you’re trying Linux to learn it more or just to take advance of privacy.
I thought it might be useful to move the iron back and forth a little for long rows. Wouldn’t be perfectly even but would be better than concentrating heat in the center.
This trick might be more useful for people who are budget constrained. In the past I’ve resorted to cutting the plastic between the headers (making them unusable), so this is a nice alternative without the need for another tool. If budget wasn’t an issue I’d likely buy a much nicer iron and an extra wide knife-style tip.