It's simplest to think of site design as having three parts. A common mistake is for people to know what they want the site to do for them, but not for their site visitors. Then you end up with a site that makes you happy, but no one else on the planet gives a hoot about it. But if your site is for a company or group, and you need it to actually do something, then you must figure out what you want it to do, for you, and for your site visitors. Once you know what you want your site to accomplish, it's simple to start to create an organization for your site that helps you accomplish that goal.
Most sites start with a home page.
Most home pages are more like an introduction and table of contents in a magazine than a magazine cover. Visitors should immediately learn what the site is about and what it's offering them. Home pages also introduce visitors to the organization of the site how it's arranged in terms of sections. This page can add style to the site and act as a ceremonial front door, but because they present less information than a home page, some users find them annoying. One is that they should be very short and the entire page should be visible on a single screen.