Here is a link to the official guide.
To briefly answer your question: yes it is easy to make enumerated and itemised lists, and there are a few tricks you can use to make them quite useful. First, the basic syntax:
* This will create an itemised list
* Place an asterisk or a hyphen at the front of each line
- With a space after the punctuation mark
- Or a tab, if you prefer that look
- That's all there is too it!
1. An enumerated list is made like this
2. Enter a number, followed by a dot and a space
3. In front of each line
2. The numbers don't actually matter, though
10. When exported, this will be number (5)
That numbers are ignored make it easy to insert lines later on and not worry about having re-number everything.
Lists can be combined and indented, too.
* Here is a bullet line
1. Item one
2. Item two
3. Just add either five spaces, or a tab to create a sub-list
* And another bullet
Finally, if you need multi-paragraph list elements, you can do this as well.
* The line starts here
And continues here. This will be displayed as a new paragraph.
* You could start the next bullet right after
But I like to add a second space after multi-paragraph lines.
* This is okay to do, and remains a part of the same list.
* I think it looks better that way.
With Scrivener, since it is a rich text editing environment, you could even make a style that indents the bullets so that everything looks nice and tidy, and not too dissimilar from ordinary RTF style lists. Here is what lists look like in my Scrivener projects, if I care to style them:
Since all formatting get thrown out, it is perfectly safe to do this.