Biggest problem for me when I first used evil was learning that C-g is what I need to press when I accidentally hit an emacs chord sequence and want to abort. I had to google a few times to find that out when Esc wouldn't get me out of the minibuffer.
1. Install emacs. Start emacs. "Alt-x package-install" press enter "evil" press enter.
2. Open your .emacs or .emacs.d/init.el.
Done.