I searched but never ever found a website with Linux help specially for non IT people. This is seriously needed. Everywhere I've looked, gatekeepers with no clue about the GUI solutions, insist people use the command line for day to day user tasks. Sure things vary between desktop environments, but it's important people learn about their desktop. It's how they get comfortable, and stay. And not stuck reliant on strangers having to spoon feed them cryptic text commands each time. I'd be happy to help contribute. As I've found GUI ways to do nearly everything.
In KDE Plasma, if you right click on the launch menu button, there is an option Show Alternatives. Here, you can immediately select and use one of the installed alternative start menus. On top of that, you can install further launcher menus, which will then appear in the Show Alternatives list. I installed Simple Menu (from Eike Hein) that has categories, favourites and search. And let's you move the icons around. But its that easy to try out different launchers. I hope you find a good one.