I wish to quit windows..now
Install one of the easier versions of linux right away on your personal computer on a dual boot as you just cannot wean yourself away from Windows immediately. For e.g. if you are stuck in configuration of your internet connection (which i seriously doubt you will) then you can always log on to your windows box and google for answers.
ps: My primary assumption is you have no experience of *nix based systems. Even then it should not be hard these days.
Others might be better informed to let you know about the best linux distribution. As an almost newbie; i prefer Ubuntu, http://ubuntu.com.
Sachin G. Nambiar Indian Pneumatic & Hydraulic Co.