Welcome to your first project! They always seem daunting.. soon you'll be an old pro!
Does the pattern mention anything called "garter stitch"?
That's what it's called when you simply knit every row, which is what your description says to me. You knit 20, then your stitches will all be on your right hand needle (assuming your a righty) turn your work so the needle with all the stitches are in your left hand and knit that row, "rinse and repeat"
hope that helps!