Instead learn how to use bare Vim and add stuff to your ~/.vimrc and you ~/.vim/ as and when you need it.
That's the kicker. If you don't actually learn how Vim works, you're missing out on most of its power.
You don't need Janus, you need Vimcasts: http://vimcasts.org/
Instead learn how to use bare Vim and add stuff to your ~/.vimrc and you ~/.vim/ as and when you need it.