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