You can do it like this.
To add new material, simply tap +.
Secondly, use the templates.
Look through the thumbnails and see which ones catch your eye. Take a look at your images by using the Select button.
When you've selected the photographs, you wish to use, simply tap on them. To continue, press the OK button.
You may even change the background music or the narration if you'd like. Tap the Next Button.
Press "Post" when you're finished publishing your post.