Create indent for second paragraph with document import

Okay... let's start with this. Never use double returns (or soft returns, line breaks) in InDesign. All paragraph spacing should be handled with styles and appropriate above/below spacing. If, for example, you want a blank line between an opening paragraph and the next one, add a line's height (or so) of space below to that first paragraph style. And so forth.

The other issue folows from that. What you want here is a first paragraph, with no indent, and then a "regular" paragraph, with an indent. Perfectly standard text/novel style. You need two defined styles for this, so if you don't have those already assigned, there's no especially easy way to set it up. The best thing to do is set/convert all of your "body" paragraphs to the regular style — call it Body or BODY for convention — and set up the indent, spacing, etc. and the build all of your body variants as successors to that. That is, create a BODY 1st style (or such), and remove its indent. Then set it to style any next paragraph as BODY.

You will either have to manually tag all "first" paragraphs after that, which isn't really as hard as it sounds, or you can find a variation of search and replace (sorry, "Find/Change") that will find, say, the end of a heading style and apply that "first" style to the next paragraph. Honestly, I'd just set up the two styles as above and spend (probably less than) an hour going through and cleaning up the format, assigning that "first:" style and removing all extra paragraph spaces and line breaks. (You can do the last with find/change, as well.)

That make sense?