Why Infinity? Because you just knit, knit and knit. This should be your first item when you start learning to knit. It’s simple and is teaching you what means to knit.
Make it as long as you want and large as you wish. Some of us love big fluffy scarf, others like the simple skinny ones.
Cast your stitches and then knit. Knit every row.
Enjoy knitting and learning!