Computer lesson?

I am computer illiterate. I need a course, before I start working again (probably end of this year). Cles are expensive, so for Christmas, my husband bought me Windows Vista for Dummies. Do you think this is an effective way of learning? He said if I have questions, to call him at work. I can, but sometimes he's not at his desk, or in a 3 hour meeting. What do you think?