Linux

Just a note, the person just gave you a link for Debian, which is one of the main distributions. However there's many others, as there isn't a single Linux (OS), so you may want to check what you prefer.
Debian-based distributions have the best program support, at least for some of the proprietary stuff. "Download for Linux" in those cases means you get a .deb file which should work fine on these distros.

I personally recommend Linux Mint for most cases.

Oh, and you may have a bit of issue with drivers, especially if it's a newly released laptop. That's the software that makes hardware work properly with the OS. Ubuntu and Linux Mint (which is based on Ubuntu) have graphical driver manager which may come in handy.

So when folks ask especially folks with limited knowledge I mention zorin os https://zorin.com/os/download/ you can just grab the core. The main thing with this os is it uses the long term support kernel of ubuntu which means it tends to be a very stable base and then its aims to give a windows look and feel along with an out of the box experience so many common programs are installed by default like libre office, cd burner, music, video, etc and this includes wine and play on linux so you can right click a windows .exe and install it. Wine is not 100% an for games you want to use proton but its good for being about as easy as can be. One thing to note that if you go to the software app the search eyeglass is in the upper left. It is placed so innocuously that its easy to miss.

Also, if you don't have a machine to just experiment on, swapping an internal SSD drive back and forth may be cumbersome. If you've got the extra 15 Euros, buy a (preferably used) NVMe-to-USB3 adapter/housing, so that you can connect your SSD externally via USB. Such an adapter is very useful anyways. (This setup is still way better than permanently using a regular USB drive.)