Crafting with cardstock can be challenging, which is why I have created videos like the one you watched, and resources like my Cricut Cardstock Jumpstart Guide, to help you along your way of learning a new craft.
My Cricut Cardstock Jumpstart is a guide that is designed to help you learn everything you need to know about crafting with Cardstock.
It will help you learn what tools you need, which materials pair well with which projects, and even how to set up your cardstock crafts in Cricut Design Space.