I have read many conflicting things, like always. Just wondering if there's a safe way to use several DE's on one distro without messing up my damn computer lol I've tried it several times and it always messed things up. I'm currently brand new to fedora workstation 38 too btw. Thanks alot
I'm an ultra-noob, so those who know more please correct me.
I'm playing with Linux VMs and recently I installed Debian to check it out. When it asked what DE I wanted, I chose all of them :).
The only hard conflict (AFAIK) is the [compontent / feature responsible for loging in] (I don't know the technical term). Because each DE comes with a different one, you need to choose one.
What I found very confusing in practice is that I could see some DE apps and configuration settings from other DEs. So, unless you know what belongs to what, it's a bit of a mess (in my VERY limited experience).
The program responsible for logging in and starting your window manager is called the display manager. Sddm is the default for KDE and GDM is the default for Gnome.
Technically, you don't even need a display manager as you could login and start the window manager manually directly from the TTY. That's just mainly useful for when you break something in your display manager config though.