System Restore Options

Hi All,

I used Fedora 41 Gnome for 6+ months and have recently switched to Fedora 42 KDE. I must admit I do like KDE better, and I have everything customised to my liking for the most part. I am wondering what is the best way to back up my system, just in-case there is an unstable released or I screw my system up one way or another.

Also, for those who know databases and SQL, what are some good Linux options regarding that? I want to start dabbling and learning that.

Thanks!