So I recently installed Ubuntu onto my computer, but then I realized I actually should have gotten Kubuntu instead. I was hoping someone could show me how to fully replace Ubuntu with Kubuntu. Thanks for all the help.
Ubuntu and Kubuntu use the same installer so the install procedure is exactly the same. If you do not have any data that you want to save, just install Kubuntu over the Ubuntu by telling Kununtu to "use entire disk" or by doing an "automatic" install. If you do have a separate "/home" partition that you want to preserve, do not allow the installer to format it. If you installed Ubuntu, you should have no problems installing Kubuntu.