If you come from svn, forget all that you have learnt, and start from scratch. A good start would be to do the http://git-scm.com/ tutorial.
You could then continue with reading the Some good ressources to learn git manpages, they are pretty well writtenincludes:* http%3A%2F%2Fftp.newartisans.com%2Fpub%2Fgit.from.bottom.up.pdf* http://eagain.net/articles/git-for-computer-scientists/