Use the menu for discoverability if you even need that, any of the options work.
For launching just partially type the application's name and press enter. Don't even need a menu, just use KRunner (Alt+F2, there are equivalents in all desktops).
My SO isn't confused by menus despite having little to no experience with desktop computers, and neither am I, but I don't even have a full blown "menu" because I don't need one; I just have dmenu installed.