[CustomPress] CustomPress Fields

Hi,

I'm trying to dabble with CustomPress, and I'm trying to see if there's a way I can try to simplify my workflow using custom fields. I think I MIGHT have cracked it with paragraphs, but I'm still a bit confused on the mechanics of how to do the other things. Here's an example page: https://cinemaelite.com/reviews/peter-rabbit/

The idea would be to fill in all the information (cast, release year, review, quote, et al) using custom fields, so I don't necessarily have to use the Pro theme editor every now and then, and just have to adjust the template image-wise only.