Once you have created the template, you can start creating your content. As the first step to that, you start by creating a Dialogue.
Navigate to the Dialogues menu and you should see something like this the first time.
Then click the Create new button and you would see a screen like this:
The Title can be a title to your Dialogue. Slug would be an identifier for the Dialogue and you would be passing it to the API to retrieve your contents. The title and slug needs to be unique across all Dialogues in a project. The template would be the template that you created. Then, choose Repeatable type if you plan to add multiple contents like a blog post otherwise choose Single type. Click Continue and you should now see a page with all the fields where you can add your content.