A very good course on how to get started -> https://thoughtbot.com/upcase/onramp-to-vim
A game that teaches you vim motions -> https://vim-adventures.com/
Every keystroke counts -> https://www.vimgolf.com/
Really good color schemes -> https://vimcolors.com/
A pretty good cheat sheet -> https://support.cs.wwu.edu/images/1/12/Vim_cheat_sheet.png
A complete distribution of vim -> https://spacevim.org/
Unix from 1972 -> https://github.com/bahamat/docker-unix-1st-ed
You don't grok vim -> https://gist.github.com/nifl/1178878
List of popular plugin -> https://vimawesome.com/
A sane vimrc https://gist.github.com/kairichard/76dfdb8beb758466db8e716a77f030e8
Slides -> https://www.slideshare.net/kaikonig/understanding-vim