Confused about blog/squeeze/sales pages

Yep, I'd make your home page the blog page... where you write great content.

You can either put a sign up page on another page (yoursite.com/signup)
or have a sign up form right on your home page, say... in the right hand column or somewhere else visible on the home page.

Your sales page will be another page off the home page... yoursite.com/salespage

Just keep the entire site structure simple... I've sold millions in the fitness niche with nothing more than a TON of content using a home page, a sales page, and a few other key pages.

These days, creating a lot of unique content on your blog... and building a platform using your blog and social media... that's one of the best ways to succeed in any niche now.

First of all, congratulations on purchasing a great domain! That's a blessing. I would personally have my blog in the root of the domain. On the side bar, I would capture emails and offer something for free in return. You can use this to sell the book to that list. The loseweight.com/signup could be used for people who have already purchased your book. Since you know they purchased your book, they are most likely going to buy more stuff from you.

It will be an opt-in page, but not necessarily a squeeze page. Clarified here.

No problem doing that.

This one may not be such a good idea. For two main reasons (and some other minor ones) ...

1. Writing content and putting it just on your own site isn't even a realistic traffic-generation plan: all that can bring is a bit of gradual, eventual, search engine traffic. Nobody's getting rich from that.

2. I always suggest to people that they shouldn't put time and effort into trying to attract SEO traffic, for two main reasons: first, it's very precarious and makes your business Google-dependent, and any business that's Google-dependent is no more than one algorithm-change away from a potential accident (or even a potential disaster), as so many Warriors have been finding out over the last year or two, some of them to their very great cost; secondly, for me, search engine traffic, in every single one of my niches, has been uniformly the worst-converting traffic out of everything I've ever tried - search engine visitors to all my websites typically stay the least time, view the fewest pages, opt in the least often and actually buy anything by far the least often. I admit I do get tons of search engine traffic to all my main sites (because high rankings for multiple keywords happen to be a minor side-benefit of the main targeted traffic-generation method I use) but I'd hate to have to make a living just from that traffic. If you have a good look round the forum, you'll also see plenty of other Warriors making exactly this point.

Since you mentioned "articles", the important things to know (about articles, in this context) are ...

(i) Using articles for marketing is about taking your content to the places where the targeted traffic you want to attract is already looking/reading/visiting (after publishing it first yourself, to secure the initial indexation-rights, obviously!);

(ii) Article marketing isn't about how many articles you have: it's about who reads them (relates to the point above, and to other considerations);

(iii) "Good content" is content that publishers in your niche, who already have access to the traffic you want to attract, want and choose to share with their own subscribers, readers and visitors (either by publishing it or linking to it). That's a very simple, practical definition of "good content", but I think it's a useful one because it relates directly to how content produces income. Or, to word it the other way round (same thing, really), content that directly produces income is content that publishers in your niche, who already have access to the traffic you want to attract, want and choose to share with their own subscribers, readers and visitors.

It would be good to build two separate lists, anyway: a buyers' list (Kindle purchasers) and one for other traffic, separately.