Aside from the fine pages referenced by anomie and snowpine, I think you will find the free book Getting Started With Ubuntu
very helpful. It will introduce you to your new operating system very gently, and you will feel more confident in no time.
Another helpful free book is Ubuntu Pocket Guide and Reference
If you want a paper book to learn Ubuntu from then you can buy The Official Ubuntu Book
There are also some nice video tutorials available at http://ubuntuclips.org/
There is one caveat to consider with all these books and tutorials. The very latest version of Ubuntu comes with a new user interface called Unity, which doesn't look and work exactly the same as the old versions. It would be helpful to know exactly which version of Ubuntu you have. It will most likely be one of these:
- Ubuntu 10.04 Lucid Lynx
- Ubuntu 10.10 Maverick Meerkat
- Ubuntu 11.04 Natty Narwhal (comes with Unity)
I'd also like you to know about Ubuntuforums
, which is the community forum for all Ubuntu users. LinuxQuestions is a great place, and we're glad to help you here, but I want you to know that you're not alone. There is a very large community of Ubuntu users waiting to welcome you.
So welcome to LinuxQuestions, and welcome to Ubuntu. I hope it will be a pleasant experience for you.