Snapper also uses btrfs subvolumes to create snapshots, so if you did create them during your installation process, nothing to worry about.
I don’t remember if there is a way to create them after the installation, neither if it’s a tough process tho. I used to simply reinstall when I messed up with the subvolumes.
Well, as a Linux user myself, I used to do this kind of thing when I was getting started and was too damn hyped about FOSS and everything. Now, I simply ask people what they want from a computer and how much are they invested into tech.
Do you want things to be as simple as possible? Use Mac or Windows.
Do you want to learn more about how things work under the hood? Use Linux.
Gaming? Use Windows (and yes, although I’m a proud Proton user, some games just won’t work, like Valorant and PUBG).