Of course you can probably YouTube anything you need to know soecifically but I suggest buying a Kelby training app that you can get through the app store. I believe it's called Adobe Lightroom 3 Crash Course. I think I paid 9.99 for it. It has about an hour and a half of video tutorials covering the basics and it helped me a bunch.
I find general tutorials can be hard. Usually what I do to learn a new software is pick one of my favorite photos to edit. I sit down and pick out every single thing I want to change and watch a tute for each thing. Example: on a picture of my baby. 'soften skin', 'brighten eyes', 'brighten lighting', etc. They usually show everything step by step so you can follow right along on your photo. Good luck!