Yes. *Great document.
Yes. *Search for "The Not So Short Introduction to LaTeX." *It will tell you everything you need to know. *Don't worry, it's not that difficult. *Once you're used to it, it is MUCH easier than Microsoft Word, or any other conventional word processor. *You spend less time worrying about the quirks of your software, and more time worrying about the content of your document.
You can also checkout LyX, which is a nice GUI front end for working with LaTeX. *It is not the prettiest UI in the world, but it works and it works well. *