how do you set up a spread? is it just two pages taped together or like, a whole new kind of margin set?

yup just 2 11 by 17 pages tapped together on the back. The template I drop them into in Photoshop for coloring is 2ce the size too.  I’m pretty lax with margins– most of my pages are full bleed, I just try to keep dialog within an inch from the edge on the top and bottom and half inch on each side.