No problem! The fourms are here for you to ask any questions you have about the module!
There is an example of the HTML Template Visualizer in the DotNetNuke Help Library: http://www.dotnetnuke.com/Support/Help/tabid/787/TID/3025/cid/416/Default.aspx
It's very simple, and as a result lacks some features at the moment. Basically, for each row that the query returns, the Reports Module takes the HTML template you provided and does a simple string replacement: [ColumnName] => The value of the column called 'ColumnName' in the output. Then it injects that HTML into the module and moves to the next item. Unfortunately, if you want support for Headers, Footers, and other more complicated templating features, you'll have to move up to the XSLT Visualizer (there are two more articles in the Help Library that should help with that: Article 1, Article 2).
Anyway, for the following query:
SELECT * FROM {oQ}Tabs
The following HTML template could be used:
<h1>Tab #[TabID]</h1>
<p>[TabName]</p>
That would generate output like this:
<h1>Tab #1</h1>
<p>Home</p>
<h1>Tab #2</h1>
<p>Another Page</p>
... and so on ...
You don't need the "<html>", and "<body>" tags (in fact you really shouldn't use them) since the HTML generated by the template is injected into the middle of your DNN page.
As you can probably see, it's not perfect, and there are plans to improve it. However, if you need more complicated scenarios, the XSLT Visualizer is the way to go, that Visualizer is basically the most powerful one in the bunch (though you'll have to do some Googling to learn about XSLT if you don't already know the language)