Hello! Thanks your your questions, this game was challenging to try and explain in 36 words, and I can understand the confusion.
For Write a Word - it means just that. Write a word - any word, and give it a page of its own. I could have written "write a word in a blank page", but I wanted the impact of each word you write when you roll a 1 gets its own page.
When a word has its own page, it means that it's an important concept in the world you're trying to build. It could be a place - Docks, Palace, Market - it could be a concept - Freedom, Worry, Injustice - it could even just be someone's first name. The page they're on, that's their page.
For Number 2 - that's up to you. You could add a word in to make it a phrase - like, "Palace is..." and later on fill up a sentence, whenever you roll for it. The other thing you can do is just add another word that provides more context for the first word - so if you write, "Palace, ruined" - it implies not just a palace, but one that's been broken down, is aged and abandoned - which hopefully inspires more ideas as you try to figure out what ruined the palace.
For Number 5 - simply link two concepts together. Each page has its own thing, slowly built up over time, but the pages don't necessarily connect to each other. You could have a page that says "Palace, Ruined" and another page that says, "Freedom, Rare, Desired" and then link the two with a note: "The Palace was a place where many sought their freedom, as the King would allow prisoners to make a case to be let go. However, since the Palace was destroyed, this practice is now a thing of the past."
As with all games, you can follow the rules as strictly or as loosely as you like - the process here is just to slow down worldbuilding, to allow dice rolls to slow down the process so you can think about areas of your world you wouldn't ordinarily focus on, and let the process surprise you.
I reccomend using this game mostly when you're stuck - once you have enough ideas to run with and build something off of, the game isn't all that needed!