Just start using Linux, you can have a Virtual machine to play with.
But first, you need to ask yourself. Why do I want to learn Linux? What's in it for me?
If you find more motivation, from answering those question, then there's a lot of information on the web; since you were able to find Linuxquestions.org forum. I assume you know how to search the web to find relevant info and help that you need.
Here's a link to start with:
http://heather.cs.ucdavis.edu/~matlo...nuxInstall.pdf
Don't jump so fast to learn advance stuff, basic stuff is important it will take your skills to solid ground.
Good luck!!