Here's the web site of an article from National Gardening magazine that should help you get started:
Planning a Vegetable Garden: How to design and build a vegetable garden that really works.
You might also want to get a book like "Gardening for Dummies" or "Vegetable Gardening for Dummies". All the books in the "Dummies" series have great, down to earth, useful information for novices of all sorts!
Q&A Library Searching Tips