There are just four basic elements, and you will find their variations useful. The Metrum is normally body text, while the Punctum usually finishes out the text. There are exceptions. You will feel them as you become absorbed in the text.
The Question's use is obvious, but if the question text is long you may find using Metrums or Punctums to work well early in the text, but to conclude with the Question.
The Conclusion is in two parts. They are used only at the end of the Gospel text. Compact texts occasionally call for modifications.
The most common elements are shown in the figure to the right. There are others, like the reversed reductions shown in the Introduction and Ending responses above.
These are your building blocks. You can do it.