To not use Drop-Cap chapter numbers, you can turn on a feature (usually used for Psalms or Proverbs) to place the chapter number in the center:
If you don’t want any label at all (e.g. I have a Chaper label of “Psalm” in the image above) then replace the word “Psalm” with \ZWNBSP and it should work fine. Note that this will work on an entire book. If you only want specific chapter numbers to be centered, then look up the \cl marker.
Adjusting the bottom columns is a bit too hard to explain here, but there are some “Finalize Layout…” videos at this link: vimeo.com/showcase/9331905
[BTW: When need to ask a new question in future, it would be helpful if you start a new post, so that your message doesn’t get lost in another person’s thread.]