You probably know a lot of the stuff just not the terms for it. If you are interested in like tiling or scrolling window managers you can look up videos on those terms and see them. The difference between them and a DE is that they are literally JUST a window manager. They don’t come with the other features of a DE. You basically won’t have a GUI unless you build one out. This gets you into the realm of like Linux ricing. Where people spend tons of effort and time making their computers look and function in a unique way.