[hobnail]

Alternatively to what theducks said, if you want all paragraphs indented, in your stylesheet.css file you could use

p { text-indent: 1.2em; }

Then it's just

<p>blah blah blah</p>

If you wanted a paragraph not indented, e.g., after a chapter title, you could use

p { text-indent: 1.2em; }
.noindent { text-indent: 0em; }

And the html is

<h2>Chapter title</h2>
<p class="noindent">blah blah blah</p>
<p>blah blah blah</p>

In the stylesheet.css the thing with a dot is specifying a class and without a dot it's specifying an html tag.