If you go ahead with trying out git, then check out Pro Git: http://progit.org/book/

Read the first 2 chapters, sign up for an account on GitHub and mess around with a public repo for a bit. Once you become familiar with adding, staging, commiting, etc. then you can either try out another VCS like Mercurial or SVN, or move onto Chapter 3 and get comfortable with branching and merging in Git.

There's also a very nice GUI for Git on OSX called GitX. It won't let you do push/pull on remotes but it's great to understanding what's happening to your repos outside of a CLI: http://gitx.frim.nl/