I dont think there was a tutorial on how to do it(xampp) with joomla so i used a wordpress one. It's pretty much the same thing.
Here's what i used: http://www.tamba2.org.uk/wordpress/xampp/
I would suggest that you first try to do the wordpress instillation and then the joomla one.
maybe wordpress will be a better option for you because it's much easier to get up and running than joomla