OK, which version are you using? Ubuntu is the best one to start with. Anyway, it's fairly simple to use, and even comes with a live CD. So, I recommend that when you start, you don't installed, but use the Live CD to see if it works well with your computer. If any hardware doesn't work, Google to see if there is a fix for it. Then, once you see that everything works, then you can install it.
So, any specific thing that you need help concerning Linux? If so, just reply to the thread.