Install Linux on my desktop

Now that I’ve finally made the switch to consoles for gaming I just need to find appropriate replacements for all my software (I already know of most replacement I need) and then it’s merely a matter of learning how to “do” stuff in Linux (read: Ubuntu). I learned DOS before Windows, and it kills me every time I play around with Linux not knowing the simplest command-line stuff. Eventually I’ll just have to bite the bullet and do it.