there is actually nothing complex or hard to understand about KDE. You can navigate your way around as you would with any other piece of software you're new to.
My 8 and 11 year old both use KDE. About 10 minutes and they figured out enough to start a browser and mod Minecraft.
I think the people who have the hardest time are those who think they know what they’re doing so feel they need to change things.
I’ve never seen a beginner at anything start digging through settings wildly, and experienced people know what they want to change. It’s that middle ground.
maybe i'm less smart that your 8 years old, i remember i wanted to switch the bottom bar to the left and the overlay was so cumbersome... i tried a few things and ended up breaking the layout.