How to separate non-indented number points from indented number points?

You may want to look at my pdf that goes over things in greater depth with links to webpages and videos. 
Automatic Numbering in Word - my 5-page pdf

It starts with setting up a multi-level list with each level attached to a different paragraph style. This is explored in Shauna Kelly's page to create numbered headings or outline numbering in Ribbon Versions of Word. She uses the built-in heading styles but you do not need to do that. However, unless you have a reason to not use them, you probably should. Why Use Word's Built-In Heading Styles? by Shauna Kelly

If you want to have a bunch of items in a row you may want to use some plain text rather than the heading styles or modify the heading styles to not have the "Keep with next" paragraph formatting. Otherwise your pagination may be a problem because Word will try to keep everything on the same page.

The styles can all look the same. You can modify the heading styles to have the same font and weights if you want.

The indents are controlled by the Define New MultiLevel List dialog, not in the styles. Number Alignment by Suzanne Barnhill, MVP

To start setting this up, begin in the first top-level number that you have. The paragraph styles you will be using must exist before you start. Once you have it set up, apply the appropriate styles to the paragraphs that you want numbered.

You can save a template with this numbering scheme to use for future documents if you want. This can be saved in a Quick Style Set. Once you've done this a couple of times, though, it becomes second nature. As I said, I go into more detail in the pdf. The video links go to videos on setting up different kinds of numbering.