iMovie is a great starting point for first time editors.
Use this tutorial to get started with iMovie.
iMovie to YouTube Tutorial:
Basic Final Cut Express Tutorial:
lynda.com: Final Cut Express 4 Essential Training
Informative Final Cut Pro Tutorials created live in the CIT classroom with Columbia College professor, Wojciech Lorenc, open in iTunes and will give you step by step instructions.
The interactions you will hear with Wojciech's students can be quite helpful as he shares his vast knowledge with beginning editors ....questions you may also be wondering about.
Transitioning from iMovie to Final Cut Express