I have that post coming, don’t worry, sorry that I’ve taken too long. Just for starters though, this is a great way to learn XHTML/CSS and even PHP if you’re interested (But the PHP is not necessary), by making small changes to your site’s theme until it looks exactly the way you want it. I think you’ve already begun doing this but with images only so far, and that’s great, that’s how you begin, by realizing that you can actually change the look. Make sure you start out using a theme that you already kinda like though, so that you don’t have to drastically change it.

In the meantime, make sure you have Firebug installed. You can play around with it a bit by bringing it up (Click on the bug on the bottom right) and then on the top left of it click the flashlight (Inspect), then hover your mouse over any part of a website. It will show you the XHTML and the CSS that corresponds. The awesome part is that you can edit the CSS values or add/remove them in real-time, and see the changes. This is what is being used now over Dreamweaver for the most part.