Try to use lots of adjectives (describing words). For example: Once you've written one sentence for each land, think about a new land that you would like to create. You can be really imaginative!

As for NA adjectives, I'll explain with an adjective, JÔZU (to be good at) as an example. You've learned that when a NA adjective modifies a noun, it takes NA at its end. So, JÔZU becomes JÔZUNA.