When you start, be sure to first go through the vimtutor (just type "vimtutor" in your shell).

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