^ +1 to that. AJAX is amazing. If you find some good scripts you don't even have to know a ton about JS.
Another thing you must learn is CSS. It makes designing and maintaining a site very simple. From what I'm seeing it looks like you just made a few graphics and set them in tables. That is fine for small sites (like just a few pages max) but once you get into some heavy content sites you are going to want to just create one style sheet to be used across all pages. CSS is also preferred nowadays over tables and everything in your site can be layed out using CSS.
You're great with graphics so keep up the good work there. Just keep in mind that graphics take a lot longer to load than text. Also, when you want search engine ranking text is what is spidered, so if your content is mostly graphics you will not have as much to be searched on (even with alt tags).
Overall it looks good for just starting out. Just read up on CSS, AJAX, and SEO (if that's important to you)