Knitting is a wonderful craft because even when you are first starting to learn to knit, you can make projects.
Even if all you know is how to make a knit stitch (and cast on and bind off, of course) then you can make a project. Don't believe me? Try this.
Get some worsted weight yarn, or whatever kind of yarn you've got lying around the house. If it has a label, find some knitting needles close to the size recommended on the label. If not, pick up some needles somewhere in the range of size 6 to 8 US, or 4.5 to 5 mm.
Cast on 30 stitches. Knit every row until you've got basically a square (it should be about six inches all around). Bind off.
Congratulations! You've just made your first ever knit project! And what can you do with it? Use it as a washcloth or a hot pad, or make a bunch of them and stitch them together into an afghan.
This tiny project might not seem very impressive until you learn that this "pattern" (knit every row) is so popular it actually has a name: Garter Stitch. So now whenever you see "Garter Stitch" in the title or instructions for a pattern, you know that's just a fancy way of saying knit every row. These patterns are often good for beginners because there's no real pattern to follow.