I recently installed kde plasma on my computer, it already had gnome, it left my user and I entered the KDE graphical interface, but I realized I was consuming a lot of RAM, I didn’t install any program on kde, anyway, I removed KDE and I stayed with the gnome.
But I would like to know, is there a correct way to change my graphical interface? Do I need to install the entire operating system again? Or do I just install it and can already use it, did not remove gnome affect KDE performance? What would you recommend to make this transition correctly and without losing performance?