Two suggestions right off the bat.
A) don’t use more than one scene, unless you’ve got a particular reason to. When you change scenes, you’ll need to set up all of the elements of your site again on each new one. There are also some nuances to scene navigation that you may not be ready for yet.
B) read up on movie clips. A movie clip is a self encapsulated timeline. You can set them up on a frame in the timeline, and they will do their thing, regardless of what the rest of the timeline is doing.
Keep in mind also that making a web page with Flash might seem pretty easy, but it’s far more difficult than doing so in HTML. You may need to learn more before you’ll be able to make a really phat site.