Here’s a how-to in adding whitespace in your WordPress posts, as the WordPress system currently wipes them out:

For a blank line:
<p align="none"> </p>For a double blank line:
<p align="none">&nbsp;</p>For an indented beginning (or any other space formatting), format the text in a simple text editor, enclose it in the following code, then copy-paste the whole:
<pre style="font:inherit;"> TEXT </pre>

Enjoy!