I duplicated the Manuscript Times compile template and changed some defaults. After finishing (parenthetically, how do I remove indents from block quotes?)

This didn’t do it.
Instead, this was the result:
So, modifying the template had no effect. That is, selecting the modified template assigns no layouts to the section; there is merely an additional template–to do what with?
So then I tried to change the font face to Times Roman.
This eliminated the sans serif fonts, but there is no font size control so large size fonts as displayed in the editor are not affected.

Trying to assign layouts is confusing: Are these for body text or just chapter headings?
What about this one? Is it for section text, or just section headings? Is there any way to modify it? (Nothing in the template editor, which is unlinked)
Let’s go to one that looks like text , click section and then click on it. Or double click on it and don’t click section:
(Note the crosshatches between paragraphs: where did these come from? There are no crosshatch-less options.) Or how about this one?
Compile again. Here’s the result:
Good news: sans serif fonts are gone.
Too bad I can’t use them for section/chapter headings
Good news: Oversized fonts are gone
Bad news: No chapter headings.
Bad news: block quotes are not properly set (need equal margin indentation but no text indentation) as noted above, no place to fix.
Bad news: where did that running header come from? ( I know this is needed for mss. submitted to trad publishers, but that’s not my use case.
Here is the exotic, exception-laden edge case, the bizarre look --feel free to hit the space bar if you are concerned about not unseeing–I am trying to achieve:
Notice the sans serif font introduces the chapter/section.
Notice how the block quote a) is a block, is not indented, and b) is set off from the document’s left and right margins.
I could whine and say “why is this so complicated” but I won’t. Just,
how and where do I fix this? Where can I choose these exotic, complicated attributes?