If you are familiar with Photoshop but have a limited background in HTML/CSS/JavaScript then Dreamweaver would be a good fit. In fact the entire Adobe Creative Suite is designed to integrate well together.
The benefit of using Dreamweaver, in your circumstance, is that it does not require a great deal of HTML/CSS knowledge. The software does much of the coding for you while in "design" view. As you learn more HTML/CSS you will be able to use "split" or "code" view to edit and add to your site.