A good web design tool for a beginner? I am designing a webstore, would like a simple, professional tool.?

I am using the Yahoo! automated design tool currently, but it seems to limit design control (adding images, text, etc.). Easily adding new products is important to me.

Anyone have simple instructions for downloading web templates?

I have a website but it is pretty plain. I wanted to download a web template but can’t figure out how to do it! Anyone have easy step -by- step instructions on how to do this? (Think web templates for dummies!) Thanks!