How to begin? Once sufficient information exists to plan, I start writing the words to get a sense of the space needed.
I begin to explore what the overall shape each element will become.
For example, all upper case letters always make a rectangular shape. The tails and ascenders in lower case spread out, up and down into unique areas.
Rough drafts of the entire information come next. I don’t concern myself with centering, still just an overall feel for what the text will do.