I am a new user to Linux and Ubuntu. I was going through the Complete Linux Manual, but I realized that it's all about the Ubuntu 16.04 and I started with 18.04. Anyway, I was going through and tried the KDE-plasma desktop environment and didn't really like it. Everything was too small.
I think I have fully deleted it, but I can still see some left overs in my /etc/ file. (i.e. gd3, and kubuntu-default-settings) and it's still a log in option for my machine. I have read a bunch of answers and nothing seems to work.
Any help would be appreciated. Along with criticism. Thanks