If you are new to vim installing Janus or any other similar package would be the last thing to do.
Instead learn how to use bare Vim and add stuff to your ~/.vimrc and you ~/.vim/ as and when you need it.
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/