How should I structure my website?

[Jake]

That tends to be the natural order of a site with the main topic introduced on the home page and specific sub topics discussed in articles. There are pros who simply don't worry about such organization nuances and just write for their audience, longer tail keywords inherently will appear in any articles on a subject without specifically concentrating on keywords.

I have not hear any other experts focus on that balance of keyword placement, 2 things worth considering, what should your backlink balance be ? ,I believe some suggest no more than 40% going to your home page. With penalties for unnatural link patterns some are now making backlinks so they can be removed if needed, home page links tend to be harder to shed, you can't just chance the url like an inner page.