How to start building a list of people interested in my blog?

Before I ask my questions, I spent sometime reading threads to get educated on topics I am not faimilar with.

The following is the summary of what I understood so far about Internet Marketing:

For example, I want to start a business and open a health food store (as healthy eating is my focus) in my town.
The name of the store, lets's say is, "John's Market and Deli", will be the same as getting a "domain name" on the internet, correct?

The location where the store is situated is the same as "hosting my domain name" on the internet, correct?

When I walk into the store, look around, and when I see, either at the checkout or somewhere in the store, a sign that says "Please enter your email address so that we can keep in touch with you about important store information, discounts, special sale, events, etc.,", is the same as having an OPT-IN form on my page/pages, correct?

The different methods The Nelson's Market uses to bring traffic to the store, such as, billboards, classified ads in the newspaper, having a website/blog, fliers at various locations, and so on are the different methods of marketing. Having a website/blog is just one of the ways the store uses to bring consumers to the store. Similarly, I can have an online business only, without a physical location and one of the ways I can do that is via Blogging and/or creating an authority website. I can also use offline methods to bring traffic to my online website, correct?

With the list of people who voluntarily signed up at Nelson's store, the store can market to them products/services related to their interest, and this is same as building a list to my online blog/authority site and providing valuable content, information, education, tips, etc., and then provide them also products/services that suits their interest, correct?

Am I on the right track so far with my knowledge of Internet Marketing?

I hope so, and with that understanding and with your expert input, so far, I have done the following tasks toward my goal of establishing an authoritative blog/site on my topic for a particular audience.

1. Identified my interests and made sure they also provide value to my target audience and profitable.

2. Chose 3 subjects and among the 3 subjects, shortlisted one subject to focus initially (to go through the learning curve) and identified a very small to medium target audience.

3. I read here that I should research keywords first. I did not do that, instead got my domain name(related to my one shortlisted subject) with two words that can be easily remembered and spelled, with the main keyword(subject) as the first word and another word which is not a keyword) as the second word.

4. Then, using Google's adwords free keywords tool generator, shortlsited three to five phrases to write/blog upon, am I on the right track here?

5. Once, I start to make little money, I am planning to invest on paid keyword generation tools, is that okay?

6. Based on the responses I got from my earlier question to you people, I will get Hostgator and use Wordpress to blog.

Now, let's say, Nelson's Market is ready to open the store to the public and do a grand opening. That is same as getting hostgator to host my site and install Wordpress, correct?

Before I do that, should I do the following?

I have to write some small 5 to 10 page report of great value that people can download if I want them to sign up for my list, correct?

I should have 1 or 2 articles or blog posts, correct?

I can write as to what the goal of my site on the "About Us" page, correct?

What should I write on the home page?

After this, what should I do to attract traffic to my website?

Thanks,
Peter.

P.S. Sorry for the long post. I like to ask questions and learn. Also, I write down the steps as I do and teach one more person, that way, I become good at what I am doing.

P.S.S. I would like to critique my writing and let me know if I am communication correctly and readable to you, as this will be my style on my blog. Thank you.