The question is not "How" but "Why" you would want to ever do that in the first place;-) Many years ago I knew a university professor and students said about him he might leave uni occasionally but he sure never leaves Emacs. Some live in Emacs, some live in Vim.
Honestly, I tried several times over the decades and walked away with my head buzzing.
PS: I don't live in emacs either!
What I do love in both camps is how the explanations begin... "All you have to do is...[insert irrational (to non-vim/emacs users) command]" which makes me laugh every time.
Love the article, which ironically proves my stance of me keeping well clear.