If you want to try knitting, might I suggest borrowing a good beginners book from the library: Teach Yourself Visually: Knitting or Knitting for Dummies are good.
Then get some basic needles and some worsted weight yarn in a light color. Don't get too caught up in choosing - your local craft store should have Lion Brand Wool-Ease or Paton's Classic Moreno. Get needles in a size 8 or 9 ... either will work. Also, don't worry about wood vs. metal ... it's all personal preference. They should be around $5 per set ... if you're really curious, then buy one of each. If you're not only curious but also clever, buy them in different sizes so you can see the difference it creates in gauge.
Then just follow the book, cast on 20 stitches, and knit back and forth until you are ending up with an even product. Then throw in the purl stitch and go until it's comfy and even.
Then start looking at projects, because you're on your way!