We need to make sure you start with the right thickness of yarn.
The thickness of yarn is called its weight. There are seven thickness categories of yarn.
The weight of yarn shown here is the second-thickest category, called “Chunky.” It is the easiest weight for beginners to use. It is durable and can go in a washing machine.
Why buy two of them? That is the amount of material it will take to make a full scarf.