Make sure to pay the bills
The main version of fedora comes with gnome but you have opinions for KDE. A lot of people just install KDE along side gnome but I like Fedora KDE spin because it feels cleaner not having the gnome apps. Even though you can use fedora right after install there are a few things most people like to do first. You will use dnf (its like apt but in fedora) and flatpaks mostly.
After that you should be good to go. With rpm fusion and flathub there really isn’t going to be any packages you can get in debian but not fedora
While fedora kde spin is my favorite some other good opinions are opensuse, debian, and something arch based if you want something a bit different. Out of all of those debian will feel the most comfy but its not known for having up to date packages since they do lots of testing before pushing an update.
I really like KDE. My current system is fedora KDE spin though I also have sway installed but I don’t use it much. I changed some KDE keybinds to feel more like sway and i3.
I found there isn’t any great way to do so. Your best bet is finding a theme that works for you. I like cinnamon for a nice default look though I am thinking of switching back to kde so I can customize more. The one theme I like has a title bar to big ):
When linus dies we will pull a weekend at bernie’s and make commits under his name then we will turn him into a human meat puppet.