I did it last year, and it took almost two weeks before i felt like i was even somewhat productive again. However, now, i feel exactly the same way when trying to use an editor without a VIM mode. What? I have to use the arrow keys to move the cursor? But, i'll have to move my hands! sigh
In fact, it'll start taking over in how you interact with your whole coputer. I find that I type "<ESC>:wq" in chat windows, comment boxes, etc..
And you can probably do all kinds of other powerful stuff that I don't understand, because I'm an emacs user who only uses vim on occasion. ;)
But once you know that I think it's simpler to just type ZZ
Then, if you have questions, come to #vim on freenode. There are lots of very, very experienced and knowledgeable people there that will be happy to help you learn.
Then, if you still need more, there's:
Vim tips wiki: http://vim.wikia.com/wiki/Main_Page
The best collection of vim scripts: http://www.vim.org