Hi,
Do you have a sense of what your boss wants to use linux for? This can help us to point you in a better direction. If you want to learn linux I would recommend that you install it on a computer or laptop that you can use a lot. Then you can play around with it and make mistakes, reinstall, and repeat till you have a hang of some things.
I also know that a few of us here have worked with linux for a while, I know that I have been using it since about 2006, so I have seen the good and the bad with linux and can recommend things. I don't want to say that I know the most about linux here as there is always things to learn but I remember when it was just myself and DJCHRIS that were using a linux. That is just a little reminisce for some of the older members.
Feel free to ask me or others anything and I am sure that we can find something for you, most of the time it won't cost you money.
Cheers!