Learning OSX?

So a lot of jobs in my area require that I know how to troubleshoot and work with Apple software, mainly OSX. Are there any videos or video podcasts that show you how to perform tasks that you would generally do in a windows environment...how to join to a domain, share files, manage users, etc?
I have the time.
Money to purchase a Mac and teach myself, I have not.
I have the time.

Money to purchase a Mac and teach myself, I have not.
Present goals: MCAS, MCSA, 70-680
Comments
I picked up a 400mhz IMac last year for $50. Runs OSX.4 just fine. Used PC133 ram.
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CompTIA Network+ March 7, 2008
MCTS Vista 620 June 14, 2008
MCP Server 290 Nov 15, 2008
MCP Server 291 In Progress (Exam 12/28/09)
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or go to berkley
anyways, sorry about that.
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Try this one for a Mac substitute instead.
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I got a good laugh out of that one. As a side note, check out the minimum system requirements for that link to the toy keyboard:
Operating System: Microsoft Windows 2000, Windows XP or Windows Vista™
Oh wait, nevermind, it sucks and is basically useless for system administration.
http://www.lynda.com/IDsecrets/
Mac OS X 10.5 Leopard Essential Training - 7.25 hours long
Mac OS X Server 10.5 Leopard Essential Training - 11 hours long
But these are what I used. I actually had 1 on 1 training session from the author of the second book... He trains all apple employees and many contractors who are "high end" customers. The only reason he doesnt publish his own books anymore is due to that he is employee'd by Apple now.
Great books, even better person to work with!
Schoun Regan
Mac OS X Advanced System Administration v10.5
Author: Edward R Marczak
Mac OS X Server Essentials Second Edition (10.5)
Author: Schoun Regan