I saw on the FAQ that normal users can add new shows or things like that onto the website, but I can’t find any way to do that? It says that you can click a button to add one, but I don’t see any button anywhere on the app or the website. 

Hi,
The options you are looking for are located under the EXPLORE tab on the navbar. From the explore tab you can go to the Add New Title & Add New Person page.
And since you'll be new to it, definitely check the Guidelines HERE.