Soutaisei I've decided to reinstall and go with KDE
Whatever the reason that brought you to that decision, you're going to be very happy with your choice. Plasma is small, fast, remarkably configurable, and reliable. Lots of us here use it, for one reason or another.
It can be confusing for anyone to use a new DE. If you have any questions about where to find a setting, how to create virtual desktops, or whatever, just ask here in the forum. You've got people.