In the upper right hand corner of your page, "Click Help". Then go to the Learning Center which the introduction paragraph is referring to. Here you will find everything you need to get started writing hubs.
Most important-Don't hesitate to submit your hub. This site is very user friendly. They will work with you and let you know if you aren't doing something right.
Be sure to enter the right category for whatever you write about. Anything having to do with writing or reading books belong to the Books, Literature and Writing category as well as the poetry you write. There are over twenty categories to choose from and each have second and third options to explain your work.
Good luck and welcome to Hubpages.